Hmm I didnt look into tutorials and self taught myself so i think i may have done the rotation wrong this whole time? which is odd since i cleared EX and a few Savage with my rotation.
Mine was: Hypercharge--> HS-> Gauss-> Reload (3)->Spit (2)->Slug (1)- FT->Split (Slug Proc/Clean Proc)-> reassemble-> Wildfire-> Clean shot-> Q Reload (1)-> Rapid fire-> Slug-> Rico->Clean-> Gauss-> "Heat blast" x2->Split (Wildfire expires 20k dmg usually) then Turret overload when Vulnerability debuff wares off. idk if it was optimal i just assumed it was as my DPS wasnt terrible