you playing him wrong, you also need to pay attention to your weaknesses. All you companions will die easily if you have them out vs an enemy who can hit their weakness. There are so many elemental swords he can use earlier on. That fire sword from the 1st dragon i carried that until act 3 and dump it for stronger elemental swords
Stroll has so many strong multi hit and multi enemy hitting moves. His final forms he a swiss arm knife able to exploit all dmg types. for me he only sucked vs undead but the mc and final 3 companions can handle that.