I would first think to the old pc sparrers if my gut feeling that they would do worse in guild spar didn't kick in. If I had to make a team:
Core
Ares
Brett
Dante
Praydoh
Thallen
Sub
CC
Ph8
It's obviously very hard to pick, and many of these may not be attuned to gs as they're oldies. I'll post another team with newer players later.