We all run strat live regularly, but were there any 5 mans that proved to be exceedingly difficult for your team?

Currently Baron in strat UD is proving to be a challenge, but that is more so my priest being undergeared. DM North is also rather difficult, lots of pats and I have a very hard time trying to do Kromcrush, usually by the time the adds come I am out of mana.

Maybe someone will see a post and have some tips or tricks.