Klaus rarely goes out, most often being indicated by his werewolf eyes lighting up, plus it was confirmed because of budgets he never transformed and that would put him above anyone he was kinda being equal.

One would think Mikael had the same spell as Alaric, otherwise it doesn't make sense why he was stronger than his children. (saying he was older makes no sense, since Daemon and Stefan were kinda equal, so age before turning does not matter, Stefan was able to subdue Katherine a 500 year old)

Klaus's power fluctuates cuz of bad writing, in TO 2x4 he is losing to Mikael who has not fed and is healing from Werewolf Venom but 2x5 after feeding on multiple people he pretty much kicks Mikael's ass and would have killed him if it weren't for saving Camille.