First i want to point out that i appreciate everyone that commented on my last post. i think all of your ideas where useful and i'm going to talk with the player as well as our dm to come up with a good solution for his character. Again i thank you.
Now for the reason of this post. My Dm has left it up to me to decide how we retake a castle. our forces are pretty small mainly just the 4 characters and some cohorts we picked up to fill in the gaps. My question is does anyone have any good seige tactics or advice for a seige type battle. The lord of the castle is a evil cleric of hextor and his main advisor is a necromancer. so i'm expecting to encounter hordes of undead, they have dealings with the dark elves as well as the dark dwarves. he said we'd be encountering githyanki as well as many golems so i'm a lil skeptical at taking the frontal approach. any advice as to what our small party could do to take this castle would be greatly appreciated.