Stronghold vs. Necropolis

Orc versus Necromancer. Any suggestions? I'll start with my observations: the Orc Warrior is weaker than the Necromancer Shaman, even though it seems like it should be the other way around. However, considering the combat abilities and bonuses to health, etc., there's only a slight advantage, which the Shaman can easily take. Orcs are difficult to heal, and even Life Drain won't help much, but it can be very effective for the Necromancer. One option is to level up the Shaman in Blood Magic, place a Storm Totem in front of the opponent, and attack head-on; this might work. In general, share your builds and experiences if you have any.