HOMM 5 - Necromancer having fun

Raven vs Faiz
Battle from the custom map "An Island of One's Own"
Played on Heroic Level.
I could have finished the map way faster (like month 4) but I visited every bonus stat building on the map and got best items just for fun.
Raven's skills:
Expert Destruction Magic
Expert Dark Magic
Expert Summoning Magic
Expert Enlightment
Expert Sorcery
Attack - 13
Deffence - 27
Spellpower - 29
Knowledge - 19