Yeah, right. There are some problems with the tactic Enma came up with. First of all, he should know that Tsuna would never kill him just to beat the opponent. The second problem is that it's Mukuro's body, so if they burned it to ash, poor guy would have no place to return to (thus pretty much killing him as well).
I would be pleased if Tsuna actually killed Enma though, he is pretty much the most annoying character of the manga.