This dungeon does not seem to be nearly as tough as prior dungeons.
My auto play teams:-

Easy
DDE
Osiris
Gunner Banshee
Gunner Lillith

Hard
Alexander Eddie
Charlotte
Sekhmet
Warrior Undead Warrior

Madness
Benji - Angel/Energy
Sentinel Desert Marauder - Eternal
Killer Prime - Immunity/Warlord/Sustinaing
Sentinel Troll - Shell/Fortune

Heals are great and Benji keeps Perfect Immunity up so no worries from Ferryman. Usually finishes in under 2:30 minutes. Best time was 1:01. Benji will often use Nightmares to Perfect Corrupt Wickerman Eddie and block his Destiny set. As long as you block his beneficial effects he is toast. Sentinel Lillith could also help as well as any ally or Eddie that can corrupt or block. You definitely want to have Perfect Immunity up though because if not you have about 1 round if Doom lands on you before you blow up. Cant wait to see the Arena paired with with Mystic Eddie and Ferrymen.