How are buffs vs debuffs calculated? As in, a enemy has a +25% attack, then I cast a -50% attack, is the buff added first  then the debuff, or do they cancel each other out to equal a strait -25% after. In the global chat I was told it's the same either way, but they didn't understand. 

Let use round numbers

Base atk of 1000

+25%=1250

-50%=625 atk

The other way is.

Base atk 1000

+25%-50%=-25%=500atk

This is a large difference in bigger scales.

Or if it's the other way, enemies cast +50% to my -25%. So does anyone know just how they calculate this?