When hard mode comes out for corta's end everyone will be looking for warlocks. Ya u could have a titan but they are useless, and half useless if they have the helmet that makes the enemies blind in the bubble.
Edit 1: there is no need to mention hunter (especially in a raid argument)! They are more useless then titans!
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Class doesn't matter the player does. Seen many terrible titans, warlocks and hunters in my time played. As well many amazing hunters etc. All comes down to the person working the controller.