Personally I'm okay with Melkior's build. He's definitely standing out compared to everyone else so far.
So question for you guys. Do you want to continue this campaign and find out what happens on your own, or do you want to just say you survive it, find out the full details as to what would have happened, and rebuild your characters for the sequel? At the same time, you could always build a new character for it if you're not satisfied with your current one. The main difference being you'll pretty much know exactly what you're walking into.
@ Stormcrow -- Your character would I would highly suggest making a new one, unless you can figure out a way to summon at a DC 40 with a level 24 character.
I'll allow Leadership again, but only for you guys because we probably won't have enough players again, and we'd likely need the PCs. However, you'd be exactly two levels lower than your main PC.