The only option you could take would be to do it within Azura's Star campaign if possible.
@Turelus - EU PC Megaserver "Don't count on others for help. In the end each of us is in this alone. The survivors are those who know how to look out for themselves."
it cost 3k gold to reset cp.
So if you plan doing some serious event or testing its worth it.
Not just for an causal duel.
The point is to try and see if everybody is following the agreed no CP rule.
Because somebody could easily allocate their CPs in the green and blue tree without anyone else noticing.