Necromancers Castle

[darthmaul]

Any Tips on land of the dead and the main quest...its to freaking hard im level 15...and i know im getting way ahead of myself but the arhimages and snakes and 2 more units that i use are not on the market anymore and that sucks .. if i don't destroy the necromancer the units won't apear again in castles...and ill probably have to go with a completly different army latter which sucks :S