boss fight hits are percentage based, not health based. example: if you have 100 health, you do 20 hits, (and take 5 damage/hit)... if you have 300 health, you still do 20 hits, (but take 15 damage/hit). It keeps players who put skill points into health from being able to fight more boss battles and get more items. So what is the point of health? Other than keeping you from getting killed by players who do lots of damage, dunno. May help the battle formula, but doubt it.