I know this isn't the thread for this, but I'm going to throw it out there anyway.
There really isn't a huge interest in 29 wargames. Last night a team of people who play majority of 20s and go wargames on 20s thought it would be cool to try it, so we faced <Perfection>. I'm sure we could get our group going again, but you would be better off in this bracket making a team for 20s. I could tell you right now you have <booty wizards> and <ATMO> 100% ready to field a team for some games. Also there are more people working on getting their teams going.
But yeah, rule wise like everyone else has said, cut the spec limit, just limit one BM Monk, one Arms warrior. Just an example cuz I'm sure no one is stupid enough to do it, but if a team was to run two Shadow Priest then they wouldn't be able to run a Discipline Priest, that's on them though.