The Tavern

His harpooning is not making sense IMO. First he nets you, then frees you from the net by yanking you out of the net next to him. I get it is easier to harpoon a netted rune-quester, but it feels wrong to me. Especially since the first time this happened I wasted 3 blinks to get out of the nets. What do you think?

Harold as unique is really misplaced and doesn't make much sense. Just remove him instead of trying to reform him. He was deadlier and a better unique before the reform. He taught you about the deadlyness of fire bolts before (prepares for orc sorcerers).

Reasons to keep him: He adds net drops.

Reasons to remove him: really unremarkable unique, no learning effect - each of his mechanics is already taught elsewhere:

Sentinels mark - alarm traps.
Harpoon - swamp worm vaults/swamp entry vault.