Because i feel Smoker never used his logia ability concretely well either because of an inability to do so, or Oda being the one not creative enough to manage(doubtful when you know what he did with rubber) or Oda simply not caring enough or waiting for future events to develop more(doubtful at this point after this long time since we know Smoker), i decided to give my own optic concerning what i think remains a wasted potential in Smoker's overall abilities
Rokushiki Variations
1) Geppou: He can already fly though, so not really needed
2) Tekai, shigan: Don't Suit Him
3) Soru: Launcher
Smoker already has a move called white launcher. Combining that with the speed of soru, i think he can improve it and call it 'Launcher' instead of soru before disappearing with speed.
How it would look:
He would use a smoke explosion in his legs to propel himself He can use it in conjunction with Geppou to bounce around in the air with high speed
4) Kami-e: Kami-e Kenpo--
Smoker's Fruit is very maneuverable. Kami-e's working involves the body moving with the air around attacks. Its drawback is the inability of user to fight back.
Smoker can make his body move with the opponents attacks thus dodging most of them and being able to fight back at the same time due to the nature of his fruit.
5) Rankyaku: Smoke Rankakyu--
Rankyaku works by compressing air into slashes. Since smoke is denser, the Rankyaku will be stronger than a regular Rankyaku
How it would look:
Smoker coats his jutte with flowing smoke and then slashes. A gray smoke slash is propelled forward. He may use it with his legs
Though i don't really want Smoker to gain this move because i feel it's too related to swordsmanship and Smoker isn't a swordsman. I could see Tashigi having a similar move though
Special moves:
1) Backdraft:
Backdraft is a phenomenon encountered by fire fighters, where super heated smoke, on contact with oxygen ignites explosively. Smoker can apply this in a way that would be basically like a more explosive version of the mera mera no mi.
2) Choke: It's simple and effective. Fingers become smoke. Enter mouth and nostrils and choke the opponent till he's unconscious.
He could also stealthily poison his opponents by releasing smoke rich in carbonmonoxide, CO2 etc like Morel from Hunter X Hunter (or magellan's poison gas)
3) Steam Engine Body: (Like Gear 2)
Smoker pressurizes smoke within his limb bones. It takes 3 seconds to activate.
He then releases intangibility at certain points, causing it to act as smoke jets. The only drawback is that smoker cannot dissipate like a logia, or he would lose the built up pressure in his bones.
Examples of Applications of Steam engine Body:
a) Jet attacks: These are analogous to Gedatsu's Jet punch but may be applied to legs, for Jet kicks. Smoker can use these in rapid fire for a Jet Gatling attack.
b) High speed Movement: Like Kuma, smoker can zip around using his jets. Or he can use it like an analogue of CP-9's Kamisori
c) Smoke Bullets: Pressurized smoke bullets fired from his fingers, imbued with haki.
d) Jet cyclone: Smoker can spin at an extremely high speed with his jets. He could use this with his jitte to emulate Vergo's Onitake.
e) Smoke Ring: High speed hakified smoke rings fired with his palm. Like Kuma's pad canons.
f) Gattling Smoke rings: Like Kuma's Tsuppari Pad hou
g) Largest smoke Ring: Rokugan equivalent. A smoke ring done with both palms
4) Freeze Burn:
This is Kuzan inspired. Whenever a highly compressed gas is allowed to expand it causes sudden cooling. This is observed when people burn themselves overusing deodorant
Smoker has control over the pressure and density of his smoke.
How it would look:
Smoker creates a small cloud of smoke. He then compresses it into his hands like Kuma's Ursus shock. He then increases the amount of smoke in his hands further compressing the smoke with his Strength. Finally he uses Launcher(soru) to get close to his opponent and release it like Aokiji's Ice Time.
Usage and Effect:
It doesn't freeze the opponent solid, but does a lot of damage by destroying blood vessels, nerves and muscles. If used on a limb the opponent loses function of the limb temporarily. If used on torso or head, it can be fatal.
5) Ashigara Dokoi equivalent: Smoke cancel.
Basically a smoke ring hakified. More a defensive move.
6) Smoke Bazooka:
Smoker covers his entire arm with Haki.
He then fills his upper arm and shoulder with the super heated smoke that cause backdrafts. After a sufficient pressure is built, he releases tangibility over his upper arm, which causes air to come in contact with the smoke. The resultant explosion propels his fist at an extreme speed towards his opponent.
Smoke harpoon: A variation of Smoke Bazooka, where smoker holds his jitte in his hand to be propelled as a harpoon.
7) Smoke tendrils:
He generates smoke tendrils during close quarters Combat that would help to disorient his opponent by throwing them off balance. Combined with Kami-e Kenpo this would make him nearly invincible to a brawler type.
8) Giant Haki Smoke Fist:
I believe Smoker's Smoke could be as dense as the skypiean clouds. If he coats a Giant smoke fist with haki, it could function like G3
9) Smoke cushions:
Basically using his smoke as an air bag to reduce the impact of attacks, by creating a cloud of smoke.
10) Corrosive Smoke: He could alter the chemical properties of his smoke to create a corrosive, acidic smoke, which could cause a lot of pain.
11) Smoke burst: Used in close quarter combat. Sudden bursts of dense smoke generated from smoker's feet throw the opponent off balance.
12) Smoke Room: Smoker generates a giant area of smoke from his body hair. Anyone moving within this area can be easily detected. This would enhance smoker's Color of Observation.
This is basically my output on the matter
PS: There are other wasted devil fruit abilities in my opinion, including M5's ability(though Gladius has a similar one, except in actual concept) or Pica's Ishi Ishi No Mi. The later ability can easily be one of the most broken one when you think about it, but Pica wasn't really using it well(well until latest chapter where he finally started to use it a little bit correctly)
Rokushiki Variations
1) Geppou: He can already fly though, so not really needed
2) Tekai, shigan: Don't Suit Him
3) Soru: Launcher
Smoker already has a move called white launcher. Combining that with the speed of soru, i think he can improve it and call it 'Launcher' instead of soru before disappearing with speed.
How it would look:
He would use a smoke explosion in his legs to propel himself He can use it in conjunction with Geppou to bounce around in the air with high speed
4) Kami-e: Kami-e Kenpo--
Smoker's Fruit is very maneuverable. Kami-e's working involves the body moving with the air around attacks. Its drawback is the inability of user to fight back.
Smoker can make his body move with the opponents attacks thus dodging most of them and being able to fight back at the same time due to the nature of his fruit.
5) Rankyaku: Smoke Rankakyu--
Rankyaku works by compressing air into slashes. Since smoke is denser, the Rankyaku will be stronger than a regular Rankyaku
How it would look:
Smoker coats his jutte with flowing smoke and then slashes. A gray smoke slash is propelled forward. He may use it with his legs
Though i don't really want Smoker to gain this move because i feel it's too related to swordsmanship and Smoker isn't a swordsman. I could see Tashigi having a similar move though
Special moves:
1) Backdraft:
Backdraft is a phenomenon encountered by fire fighters, where super heated smoke, on contact with oxygen ignites explosively. Smoker can apply this in a way that would be basically like a more explosive version of the mera mera no mi.
2) Choke: It's simple and effective. Fingers become smoke. Enter mouth and nostrils and choke the opponent till he's unconscious.
He could also stealthily poison his opponents by releasing smoke rich in carbonmonoxide, CO2 etc like Morel from Hunter X Hunter (or magellan's poison gas)
3) Steam Engine Body: (Like Gear 2)
Smoker pressurizes smoke within his limb bones. It takes 3 seconds to activate.
He then releases intangibility at certain points, causing it to act as smoke jets. The only drawback is that smoker cannot dissipate like a logia, or he would lose the built up pressure in his bones.
Examples of Applications of Steam engine Body:
a) Jet attacks: These are analogous to Gedatsu's Jet punch but may be applied to legs, for Jet kicks. Smoker can use these in rapid fire for a Jet Gatling attack.
b) High speed Movement: Like Kuma, smoker can zip around using his jets. Or he can use it like an analogue of CP-9's Kamisori
c) Smoke Bullets: Pressurized smoke bullets fired from his fingers, imbued with haki.
d) Jet cyclone: Smoker can spin at an extremely high speed with his jets. He could use this with his jitte to emulate Vergo's Onitake.
e) Smoke Ring: High speed hakified smoke rings fired with his palm. Like Kuma's pad canons.
f) Gattling Smoke rings: Like Kuma's Tsuppari Pad hou
g) Largest smoke Ring: Rokugan equivalent. A smoke ring done with both palms
4) Freeze Burn:
This is Kuzan inspired. Whenever a highly compressed gas is allowed to expand it causes sudden cooling. This is observed when people burn themselves overusing deodorant
Smoker has control over the pressure and density of his smoke.
How it would look:
Smoker creates a small cloud of smoke. He then compresses it into his hands like Kuma's Ursus shock. He then increases the amount of smoke in his hands further compressing the smoke with his Strength. Finally he uses Launcher(soru) to get close to his opponent and release it like Aokiji's Ice Time.
Usage and Effect:
It doesn't freeze the opponent solid, but does a lot of damage by destroying blood vessels, nerves and muscles. If used on a limb the opponent loses function of the limb temporarily. If used on torso or head, it can be fatal.
5) Ashigara Dokoi equivalent: Smoke cancel.
Basically a smoke ring hakified. More a defensive move.
6) Smoke Bazooka:
Smoker covers his entire arm with Haki.
He then fills his upper arm and shoulder with the super heated smoke that cause backdrafts. After a sufficient pressure is built, he releases tangibility over his upper arm, which causes air to come in contact with the smoke. The resultant explosion propels his fist at an extreme speed towards his opponent.
Smoke harpoon: A variation of Smoke Bazooka, where smoker holds his jitte in his hand to be propelled as a harpoon.
7) Smoke tendrils:
He generates smoke tendrils during close quarters Combat that would help to disorient his opponent by throwing them off balance. Combined with Kami-e Kenpo this would make him nearly invincible to a brawler type.
8) Giant Haki Smoke Fist:
I believe Smoker's Smoke could be as dense as the skypiean clouds. If he coats a Giant smoke fist with haki, it could function like G3
9) Smoke cushions:
Basically using his smoke as an air bag to reduce the impact of attacks, by creating a cloud of smoke.
10) Corrosive Smoke: He could alter the chemical properties of his smoke to create a corrosive, acidic smoke, which could cause a lot of pain.
11) Smoke burst: Used in close quarter combat. Sudden bursts of dense smoke generated from smoker's feet throw the opponent off balance.
12) Smoke Room: Smoker generates a giant area of smoke from his body hair. Anyone moving within this area can be easily detected. This would enhance smoker's Color of Observation.
This is basically my output on the matter
PS: There are other wasted devil fruit abilities in my opinion, including M5's ability(though Gladius has a similar one, except in actual concept) or Pica's Ishi Ishi No Mi. The later ability can easily be one of the most broken one when you think about it, but Pica wasn't really using it well(well until latest chapter where he finally started to use it a little bit correctly)