I had a try at Daert and managed to get to the Shelter using the 2 Vampire trick. I also managed to destroy the Dwarven stack (no ranged units) by running the vamps around and hitting the enemies with their last move of a turn. Took 109 rounds.

But I can't seem to do anything at all about the Human or Elven stacks, not like this. Ridiculously tough. I only got money out of the Ore Cart so all I have is Poison Skull. I put two points in Concentration but it isn't working.