Um... do I win?
I mean, the fire's burning hot (especially once the tree catches), which will pretty much wreck Hisame's body, which is already crushed. Even if this doesn't qualify as 'utterly destroyed' (and if this doesn't, what does?), it'd still take ages to heal- and even then, she'd be left stuck under a tree. Fights go until death or incapacitation, and though the former is not certain (not sure how crazy her regeneration is), the latter has been pretty much accomplished.
The reason I'm asking here is because you basically had her stand there and take the hits. This might make sense, in-character, but I find myself wondering why you entered the fight with someone so clearly suicidal... Not that I haven't enjoyed it, the two characters are really interesting! It's just unusual.
Edit: okay, second form here we go.