Same Buffs should stack with each other

[c000o]

Hi Devs, please kindly check the effects of buffs. It should stack with each other.

Here is some evidence that buffs does not stack:

1. Rage chance does not stock, but it has a chance individual from its own. The proof of this is that a player can gain 2 rage buffs. It means that the weapon and the talent passive skill rage of deadly performance has an individual chance and does not stack with each other.

2. There are a lot of times, as in almost always, that even though I have 20% crit chance from weapon and I casted lightning charge for an additional 55% crit chance, my attacks dont crit.

i think it is the same with dodge buff

What I notice is that damage does stack but i dont know the mechanics of it, does it mean if i stack additional 90% damage buff with 55% damage buff = base damage *1.9*1.55 or it should be base damage*(1 + (0.9+0.55))