Sorry if it’s been asked before, but my search of the forums seems to be failing me. I’m looking at how to really wreck bosses with Arts damage and stacking up buffs and debuffs. For the most part I get it, but the damage formula is confusing me on one point.

“Percentage Defense or Resistance down debuffs and Physical or Arts Damage Taken Increases are multiplicative to each other, which means each one you add makes all the others more effective.”

I feel like I may be looking at it wrong, because to me it seems like it would make them *less* effective when multiplying percentages under 100%. To use an example I’ll have once I get Ifrit E2’d:

Let’s say I have an enemy in Ifrit’s range for RES -40%. Eyjafjalla hits it with her E2M3 for -25%, and I pop Pramanix’s E2M3 for -30%.

If these are additive, which other things with a + or - in front are, this would make RES -95% (RES * (1 - 0.4 - 0.25 - 0.3)), for a total of 5% of their original. Theoretically with another debuff over 5% their RES would go into the negatives, though I kind of doubt it can.

If they’re multiplicative, which the damage formula guide seems to be saying, it would be 1 x 0.6 x 0.75 x 0.7 (RES * (1- 0.4) * (1 - 0.25) * (1 - 0.3)), bringing them to 31.5% of their original. This would make each subsequent debuff less effective unless I completely misread how the formula works.

Anyone able to clarify this for me?