While being forced into Harp does partly prove your point, I don’t see any problem with that. Harp is a fine devotion and I never had any energy or casting speed issues on neither my Sorc [1.1.4.2] [HC] CRATE KILLER - Ulzuin Sorc [vids] nor my Shieldbreaker [1.1.4.0] [HC] Bomberman returns - fire Grenado Shieldbreaker [vids] . Then again I don’t play much crucible, but shouldn’t energy regen be less of an issue in crucible anyway?
As I said, I think there are other sets that need improvement, not Ulzuin’s.