At the end of the campaign and siding with the Institute...
I have to defend Liberty Prime from the entire Brotherhood of Steel. I'm playing on the hardest difficulty and even with power armor, I don't seem to be coming up with a good hiding spot or vantage point. It's very easy to get surrounded and flanked by multiple knights, Danse and other power armor users.
I'm playing on Survival difficulty, and my character uses full-auto guns with Commando.
What is the best way to complete the quest?