Managed to complete Epic and Legendary, surprisingly comfortably. Mostly same team for both events.
Epic - Wu 4/58, Caedmon + 8, Gormek 4/42, Kelile +6, Sabina +7 … did this one first and due to fear bombed them pretty hard with bombs, axes & arrows. Finished with 4 alive heros at nearly full health.
Legendary - Wu 4/58, Caedmon + 8, Onatel 3/50, Gormek 4/42, Sabina +7 … used 5 bombs, 5 health pots, 1 mana pot and 1 revive scroll (would have been fine without, just to be safe)
Rare - have a decent set of 5 hero’s, but with no healers, don’t think i’ll bother trying to complete due to the materials requried. The completion rewards just aren’t enticing enough.
Edit: did epic final stage again and completed with no items used