Cleared WC tonight - all bosses including Mutanus. It was a cakewalk; the only difficulty was with a patrolling druid that evaded, despawned, and then respawned in a wall or something and attacked me while being invulnerable. Luckily I was able to run out of range, and it actually dropped aggro.

I probably should have done this instance before Deadmines, but Deadmines was more convenient as an Alliance character.

Characters: 1 holy priest, 4 affliction warlocks
Level: 21 at start, 22 at finish