How do you fit black knights into a full army?

[BB Shockwave]

Undead armies rock. I recently played through the Legend with one, so I can offer assistance.

Zombies stood in for the Black Knights until they are available, afterwards they will be your tanks. I see no fun going solo with any unit...

My line-up was: Bone Dragons (to be replaced with Greens in certain fights, like against other undead), Necromancers, Ancient Vampires, Black Knights, Cursed Ghosts/Skeleton archers. The latter two I switched sometimes, as tactics required it.

I also used Werewolves early on, and Black Unicrons in some anti-undead fights.