Raid Composition and dps buff

[Arutan]

Foe is 10% magic(20% for 30 seconds with 3 min CD. Trick Attack is 10%, Piercing is 10% for ranged, Hypercharge is 10% phys or mag depending on turret(20% for 25~ seconds on 2 minute CD), Slashing debuff is 10% for swords/axe, Ast Balance is 10% raidwide, 20% one person or 30% one person with royal road increase.

How is it stacking?
If i'm blm and got BRD on CD = 20%, NIN = 10%, MCH on CD = 20%, AST monotarget royal = 30%, do I have an increase of 80% DPS or does it increase 20% then 10% of the increasement, then 20% of the increasement's increasement, ...

[dragonseth07]

How is it stacking?
If i'm blm and got BRD on CD = 20%, NIN = 10%, MCH on CD = 20%, AST monotarget royal = 30%, do I have an increase of 80% DPS or does it increase 20% then 10% of the increasement, then 20% of the increasement's increasement, ...

IIRC, it depends on the exact mechanic. Buffs like "do more damage" stack additively. Then when you hit someone that takes more damage (like from TA), it takes your buffed damage and amps it, so that's multiplicative.