Ok, I took inventory.
Alexx, my assassin has Duncan. She is probably my strongest character for this dungeon. Amethyst and Scarlet both struggled thru various sections of Slavers doing it with H/H. Alexx managed to complete all 4 effortlessly as a Crit Barrager. She made it to Rand in about 5 minutes. She attempted Duncan with H/H and also made it to Duncan very quickly and swapped out all the spirits. However, I had some bad setups on the heroes and couldn't kill him.
Scarlet, my warrior is also at Duncan. She has completed everything in EotN except Slaver's HM. She has the Legendary Master of the North title and so didn't need to complete. It's always gonna nag me though having that in my quest log.
Amethyst, my elementalist, has finished Duncan before and restarted. She currently has only Thommis completed although I plan to do some of Slavers with Fire Walker this evening. That Selvetarn bounty sounds appealing.