I have a level 10 party that has been exploring a demi plane with something weird going on in it. As it turns out there is a lich/antipaladin controlling the plane, and since he knows they are there and has been watching them, he has time to prepare for them. I was thinking that I would have a necromancer working for him and that both he and the necromancer would have a number of minions with them to make the final two fights more of a challenge. The traditional zombies seem to weak for my players, and was hoping to come up with something that might catch them off guard. I thought that a melee lich would throw them off, but I wanted some good minions too. Does anyone have any ideas of creatures/characters/templates that would be interesting? I'm not tied to them all being undead, in fact I think that all undead would make my bard feel useless since he has nothing but mind effecting powers, and I don't want to make him useless.
Also, it was suggested I build my necromancer as a cleric, I found a dread necromancer build here: http://www.pathfinderdb.com/character-options/classes/full-class-list/1430- dread-necromancer. Any thoughts on best necromancer builds?
Any advice is appreciated, thanks a lot!