@jake21:
I had the same problem. With my standard lineup (paladins, inquisitors, archmages, trolls and emerald green dragons) I had no problem killing normal stacks or heroes. The only problem was Black Dragons and the fight against K'Tahu and Baal. I managed to kill Zilgadis using my standard lineup. The reason black dragons was a problem was that I never found Death Star in this game. So I had to kill them with Traps, my units, and a low level fiery phantoms.
I had a scroll of Call of Death when I was up agains K'Tahu. And that worked well. Black Knights even without any of the undead items made that fight easy. The contrast is huge. Using my standard lineup I lost 50% of the inquisitors, archmages and almost as much of my emerald green dragons in the first round, and I had to give up. But, by using Black Knights + Stone Skin (must always be on - the second it is without stone skin the battle is lost) + Eviln + Calm Rage + Mana Spring + Turn Back Time + Damaging spells, I manged to win relatively easy. It just took some time.
When fighting Baal, Black Knights were not an option since I could not gather enough of them, and since I did not have a Call of Death scroll. So I ended up using Cursed Ghosts, and it worked! See second paragraph of the third post here:
http://forum.1cpublishing.eu/showthr...204#post150204