Mullikha should be unbanned; in 5 games, when I played with him, he never leveled up properly, so I don't think these +2 speed bonuses are very effective.
Keep the new mages; they add more possibilities.
Hillfort is completely irrelevant; I've never used it.
As far as I've seen in streams, when Hell uses it, the leveling is excellent – 2nd skill is defense or tactics, then logistics, and not just once, so it's still debatable.
The hardest battles are fought in the mind