You might take a look at different strategies to use. I know with my team we tend to adjust strategies based off what types each is running with. If you're having problems with the hunter, I'd just recommend having triple jump enabled and going back left. That way when adds start to show up you can use solar damage weapons and clear them out mostly before there's any real threat to all of the team. You shouldn't be getting 2 shotted unless it was by the boss himself, but sometimes crap happens. You may just make sure one of your teammates always has a titan with a bubble so you wont have to worry when he burns the ground.