Fastest strat live I've done is 19 min as 4x frost mage, 1x priest. Though I did not do this alone. Some one else was playing the priest. Biggest time save was him looting while I was drinking. We did all bosses (Hearthsinger Forresten, The Unforgiven, Timmy, Cannon Master, Galford, Balnazzar). No consumes.

When I do it solo as 4 or 5 mages it usually takes me about 30 min, and I skip Balnazzar. Note sure what my fastest is solo.