Need know how use the sb hammer with cosmic set for bosses

[AlfrostC]

1st hotbar: Proc hammer with the sb 7/6. Then switch to
2nd hotbar: set cosmic + krak armor (or blood if u have).
The cosmic set has to be the last set and u can't to proc another krak accessories (belt, ring, etc...) besides armor/helm cuz every piece of the cosmic set applies a DoT that works like its proc. And u can't switch items once dot is activated or dot will stop its effects. So the mechanic is to proc weapon, armor and helm, activates cosmic killer buff from sb 7/6 and switch to set cosmic with armor/helm/weapon that u usually use for dmg. (Hammer sb can be use as dmg weapon as well as for proc)