For some reason I can't remember much about this fic though I know it was awesome. I'm pretty sure it was a trilogy and it was one where Xander is a really strong character who is great with strategy and things. He manages to get the support of a lot of the seniors from the fight with the Mayor a while down the road to fight another battle with one of their big bads. The parts written out of his POV show the respect that people hold for him. Spike helped him drop the leader role some when he needed to. Sorry this might not help much but any help finding the fic would be greatly appreciated.