Here's a trick for the Vroom and Thrak fight, Vroom mentions he is tired before the fight and is thus weak to hypnocyst and will fall asleep easily, this allows you take out Thrak first and then deal with Vroom afterward. I will admit, this fight is a bit of a difficulty spike as they deliberately gatekeep the rest of chapter 2, but it could probably stand to be a little easier. If Vots hasn't learned hypnocyst by the time you get to the fight you may also be underlevelled.