Uni the issue is we are not putting together win groups we are just throwing together whomever signs up and not worrying about classes, gear, or skill we are doing it for fun, if we just wanted to win then we would stack a group of our best players and do it, that's not what we have been going for we have been going for team building experience for future 24 man content.
PS: not sure if you are talking about Seraphim groups or not but just in case you are the above is the reason