>>545264187
Ok ESL kun, so the bonuses are additive.
You add the number to the other number.
60x2 attack getting a +60% buff? Thats now 120%x2.
200% gets a +50% buff? 250%.
A passive giving out +8% to everything? Thats ×××% +8%, making xx8%.
This includes every instance of fortitude, resolve and morale.
Vulnerability too!
Only multiplicative I've found is damage reduction: it reduces the lump sum incoming damage by 15% before shields, but is very limited in charges.