iirc, most of CO operates on a 1/(1+x) scheme. so +100% whatever is 1/(1+1.00) or 50% damage. +200% gets you 1/(1+2.00) or 33% damage. +300% gets you 25% damage, +400% gets you 20% damage. as you can see there are steady diminishing returns.
^^^^^^ That'd mean why +50% power reduction actually reduces energy cost by 33% EDIT: Seems like the actual "reduction" formula is: 1/ [1 + (100/50)] = 0.33 OLD: As 1/ (1 + 0.5) = 0.66. Which is 66%