Alright, so with these techniques, you basically get to "change" your form or shape. Their core idea is the same, but the way they work is different.
(Konbi Henge) - Combination Transformation
Rank: C
Type: Supplementary
Range: Short
Chakra Cost:15
Damage Points: N/A
Description: The user and either there summon or a partner combine into one transformation.
Note: Must have a summoning or partner to use this jutsu.
This is the most simple form of changing your shape. Using a clone, partner or even a summon you can transform into something else. We've seen Naruto use this with Gamabunta to turn into the nine tails. Regarding its usefulness in battle, I'll let you asses that on your own.
I'd use this to combine with my samurai bio or to combine with an op ally. The thing is that combining restricts you to not being able to make simultaneous attacks with the two guys that you used to combine. Cool though.
(Kao Utsushi no Jutsu) - Face Copy Technique
Rank: C
Type: Supplementary
Range: Short
Chakra Cost: 15
Damage Points: N/A
Description: This technique allows the user to take on the body of their target. They must remain close to the one they want to copy for a short period of time. Their body will then shape and contort to resemble the target. The copy is said to be so good that even family members of the target cannot tell they are a fake. The user will even take on the smell of the original. Unfortunately, the user does not copy the targets jutsu, leaving them with only their original skills. Practitioners of this jutsu are also skilled in quickly taking on the mannerisms of the original person and playing up the character traits of their target. Through a regular Henge in combination, they can copy the clothing of the opponent. Their appearance will eventually change back to their original form after several days.
This is a real trickery technique. It could be well executed with genjutsu, but even on its own, it's quite amazing. I think it could be specially good in a 2v2 fight where you could mimic one of the opponents to confuse the other, for example. In a 1v1 I don't see too much uses, because you can technically only turn into the opponent himself.
I'd use it in a 2v2 match like you said and then I'd maybe use smoke bombs with it like naruto. I'd counter it by knowing something about my ally that the opponent does not. If it wasn't a serious battle then I'd just try to kill both or something. Lol
(Shinra Banshō Dōka No Jutsu) - Assimilate All Creation Technique
Rank: C
Type: Supplementary/Defense
Range: Short
Chakra Cost: 15
Damage Points: N/A
Description: The user can take on the properties of any earthen material they touch and harden any part of there body. This jutsu also lets the user turn into fine grains of rock that can be used to do another jutsu. The issue with using this technique is that the user will gain all the weaknesses of the material they mimic, even if they are granted their strengths.
This technique allows you to take on the properties of materials you are in touch with, thus hardening your body. This technique actually turns your body into the material you shape it into so it's very dangerous because you also gain the materials weaknesses which means that in most cases, lightning will be used against you.
I'd use this to try and tank a B-rank suiton jutsu with my arm or more likely to smash a weak projectile attack with a head butt. Lol I'd counter it with raiton stuff. I like this one.
(Hiru Banshō: Bōka no Jutsu) - Leech All Creation: Attack Prevention Technique
Rank: B
Type: Supplementary
Range: Short-Long
Chakra cost: 20 (-5 per turn)
Damage points: N/A
Description: Using this jutsu, the user can merge with another passive object and take on its properties to avoid any damage. While merged, the user is virtually undetected unless the enemy has a doujutsu. Even chakra sensors won't be able to pinpoint the users position. The limitation of the technique is that to use a technique and mold chakra, the user must fully unmerge although doing so doesn't produce any sound and the user can only be sensed once fully unmerged. The user is still aware of the world outside the object and can travel inside it at his normal running speed. The technique was used so far by 3 ninjas (Yamato, Orochimaru and Uchiha Madara) but as an advanced ninjutsu, it can be used by any skilled enough ninja.
Note: the user must be Sannin Rank and above
Note: Orochimaru and Yamato can use it 5 times per battle, Uchiha Madara can use it 3 times, other ninjas can use it twice.
Note: Cannot merge into mediums which aren't tangible
More or less similar to the previous one, to be honest. Instead of turning into something, you merge with it. This allows you to avoid certain techniques and it's a great stealth technique because only dojutsu users will be able to detect you. The biggest drawback is that you can't attack while merged, so this is only a technique to vanish and reappear in safety, in case something goes awry.
I'd use this to run away and make a clone before attacking again. I'd counter it by... preparing with clones and the rain tiger technique. Cool jutsu.
(Meisaigakure no Jutsu) - Hiding with Camouflage Technique
Rank: A
Type: Supplementary
Range: Short
Chakra Cost: 30 (-10 per turn active)
Damage Points: N/A
Description: This is a ninja escape technique that allows the user after performing the Tiger hand seal to control how light is reflected around their body with chakra inflections. The technique also erases the user's scent and shadow, and is usable on any terrain, making it ideal not only for covert maneuvers but also offensive strikes. Perceiving the user's position is possible only for ninja who are astute enough to observe minute variations within their surrounding environment, such as distortions of air currents in the immediate vicinity or distinguishing sounds, i.e. footsteps etc. However, the usefulness of this ability can be entirely negated by those with special vision or sensory skills. The Second Tsuchikage, Mū's mastery of this technique helped earn him the moniker "Non-Person" seemingly having neither form nor chakra while the technique was active. Thus, he could not be sensed through traditional means.
Note: Technique lasts a total of 3 turns
Almost forgot this one. Upon performing the tiger handseal, you can "bend" lightning around your body and appear to be invisible. This is very useful for hiding and for surprise attacks. It is hardly noticeable and one would require great focus in order to distinguish you from the rest of the surroundings.
I'd use this with the silent killing technique. I'd counter that by having rain tiger active or preparing a plasma ball shield for in case the opponent uses a silent attack.
