Isn't this the case with all haki users? This statement means next to nothing.
And any form of Haki has yet to prove it increases ones speed. Hence that statement means a great deal.
The strength of hot things is the fat they burn, since magma is hotter than all flames except Hydrogen flames ( which by the way are not blue) then Magma > Marcos fire
Using heat and physics as an argument in a OP debate is almost pointless; especially if said debate involves Akainu and fire. Why? because science dictates magma cannot burn through fire, 'cause fire can reach temperatures which would render magma into a hot liquid. But Akainu still burned through Ace's fire-body (mind you Akainu didn't use Haki while doing so) and left a hole in his fiery-body.
Hence Marco's flames aren't hotter, but pure-physical-strength wise, they are stronger.
Marco is not intangible. He can simply heal. But what use is regeneration if you have no head? Without a brain "telling" your body to heal you can't heal. Devil fruits higher in the list would destroy a meteor. Marco won't be able to with devil fruit power alone.
Then explain why Kizaru's techs continued to pass straight through Marco.
A strong DF isn't based on what it can strength wise, but rather all aspects. And Yama Yama no Mi would do shit against a human who uses Rokushiki.
Additionally, you're right about the head part. But, when the user of Marco's DF is in full-Phoenix-mode, it won't matter if there head is blown up 'cause they'll just regenerate it back (just like Marco did when Kizaru destroyed half his head).
You basically agreed with me just then. He lacks destructive power which WOULD get his fruit on the list
Then explain why the Yama Yama no Mi is top when it'd do jack all to someone who uses Fishmen Karate.
but it isn't on the list because a it can do is allow you to fly and heal minor wounds.
>Because having half-a-head is a minor wound?
>Because having two of you internal organs destroyed is a minor wound?
No it wouldn't. There is never mention of the Phoenix and regeneration of the head. It is stated it could regenerate but that is all.
Educate yourself on Phoenix's. 'Cause they are immortal. Why? Simply because once they turn to ash, they are once again reborn via those very ashes; a continuous cycle is their life.
So this exemplifies the way a DF operates and also your theory about pain & fatigue: when a DF's user dies the DF is then reborn into a new fruit - Marco's limit is that he can't continuously regenerate @100% and eventually he's flames (DF power) will fade away (along with his stamina), leading him to an easy death. And thus once he dies, the fruit is reborn.