The final boss has an easy win exploit when jumps on the platform jump in front of him but not on the on the platform and he'll do his toss up move which won't work so do that and unload on him
the only way to efficiantly play this game is to get enoungh crowns to buy all the unbreakable items that are derived items that have amounts ex: Sledgehammer Hacksaw
If you play as an Ascended you can switch body armor which suck cause you could have like a really good body armor but you can't use it due to the fact that your starting body armor is bound to you and you can't switch it with something else even if it's better
or you can use the designated mouse controls.