Impossible, Mage - No unit loss.

[Chase]

Orc Embassy: Im thinking Glots Armor and units with A LOT of hitpoints. Giants/cyclops etc. You only need to have 3 units infront, so 2 of your units are safe.

Cleared out all of Lower/Upper Hadar now except a few heroes.

Grand news! I found resurrection in Demonis. I went in there and it was sitting there in a chest. Now hopefully I can get out again as I got quite abit of loot there. Its also tempting to pick up succubi and go full demon army now, but hmm.