Is probably one of the worst mechanics blizz made, its interaction with absorbs made it stupid
I'd say a Faction Champs fight that blizzard took more time to think out so there's less of a random factor in it, particularly in the heroic mode
Thorrim and Hodir had fun mechanics.
Vehicle fights in general are terrible, blizzard doesn't take enough time working out the mechanics to make it not feel clunky
I always found Nefarion's Call's entertaining
oh and the corehounds in MC