evaluate right side first, then remember the result as the value on the left side
in case of fractions always round down


heal spells:

1) heal power = primary stat + gear bonuses
	gear bonus:
		+3 magic weapon
		+3 magic armor
		+2 magic helm
		+1 Ancient Talisman
		+2 Crystal Ring
		+TP Holy Claw


2) heal power = heal power * (base power of spell + gear bonuses + boss bonus)
	gear bonus:
		+5 heal weapon
		+2 heal armor
		+3 Protect Earring
		+2 Holy Claw
	base power:
		Heal Light: 10
		Regeneration: 6
	boss bonus:
		max(0, (level-3)/6)


3) heal power = heal power + base power of spell
	base power:
		Heal Light: 62
		Regeneration: 54


4) heal power = heal power * (60 + level/2) / 97


5) for single target spells and always-MT spells:
	heal power = heal power * 1.25


6) magic attack up/down buff on caster
	heal power = heal power * 1.25 for buff
	heal power = heal power * 0.75 for debuff
	no change if both or neither


7) cap at 999


7) harm undead instead of healing