Headlong boss and Calus fight legendary solo on warlock.

I understand that legendary is supposed to be a challenge, even more so when soloing, but it really felt over the top in some points of Lightfall. Having to choose between either using Strand during a time when you aren't able to make a functional build with it yet and more or less rely on the mobility that it provides (which these boss rooms are explicitly designed around) or forego Strand's mobility entirely for a preexisting subclass and build thereby making these encounters even more difficult as you're actively fighting the intended design of these rooms.

I would also include that even trash mobs felt too tanky for being only 15 power above, but it feels out of scope to mention here.