Not only is Brann just terrible - but the delve scaling is still just stupid. 

Soloing 11's as a prot warrior is quite literally a joke - even before I had any new gear for this season .. but if I bring one or two friends with me the mobs suddenly have a billion health and it takes 3 minutes to kill a nemesis pack. There's no extra damage going out, no one is in danger, but it's a god damn slog. It's so bad that I don't even want to help friends get their 11's done.