Guild Wars 2

Barn boss: Can go under the far stairs and hit boss without being hit back
Frost:You can jump on building to kill the boss without being hit back.

Now for the reason I’m actually making this post. You can skip all the trash after the second boss by going back to the group right before the boss and you can jump through the wall and kind of jump around on the path to eventually find your way to frost. It is kind of hard to explain but ill try to get some picks to prove all of these.

You can bypass the boss right before the barn by running to the last equipment item and then following this path

You can avoid damage from the first “real” boss by standing here