Originally Posted by
PraisetheSun
I think both our DKs played Unholy for this, and they whined and moaned about not getting synced trinket procs until they took Unholy Blight - I don't think they've complained since. If you use Unholy Blight on the pull there's enough damage instances in a short time from it that not getting everything to proc is extremely unlikely.
Also remember that the boss only goes immune in intermissions; he doesn't actually clear debuffs when doing it, so you can Festering Strike enough in P1 to keep your DoTs on the boss and not have to reapply weaker ones after the intermission.