Fighting undead

[Gatts]

1. leave some battles unfought - for instance in Marshan Swamps is a necroboy in a castle with huge undead army - it is not good to attack him on level 7, not if you consider yourself a "newbie" and double not if you like to have zero loss policy intact (I would call it a great luck to win this batttle on level 7, to have no loses would be than a miracle - statistically not possible)

Also look for guides of some players on this forum who started threads about "zero loss strategies" - you can find some, not few.

Apart of previous suggestion, I would advise following strategy:
get one strong unit (bears, griffins, or even guardsman, swordsman, who have nice armor bonus) + SHIELD from archmages and place them in front to get the undead in shooting range of your priests/inquisitors and shoot em up!
Use some of the "cheat"strategies from this forum to get resurrect all loses. Whan you have stoneskin (nearly all undead deliver physical damage) you are sorted, your TANK unit will lose minimum units, easy to regain by inquisitor resurrection, also undead shooters will will go for your tank mostly, as they have huge range penalty... do not wonder if they shoot your priests or inquisitors - they all fear magic damage of your shooters -> you could cheat them by getting fire dealing unit - like fire dragonflies - nearly all undead have fire weakness - but these fire dragonflies may die very fast... so resurrection would be a bugger.