Good Base Creatures for medium to huge humanoid skeletons?

[Shin Okada]

Well, unfortunately, a mass of weak skeletons don't work in this case mainly because we are using Complete Divine variant rule for turning undead. Even without that, she is a cleric with magic domain and carrying CL10 wand or Fireball. And there are a sorcerer and a warmage in the party, too.

As the encounter is fought on Acheron, outsider skeletons will be OK. There should be a lot of dead outsiders around.