Why not just capture a single flag on your team and take it in turns of teams going for kills ?
EG : team one will cap A and then go on a mad kill streak getting some serios points and new killstreaks
EG : team two will then do the same thing in the next game withch means its all fair and no one can bitch/complain about it being unfair as every one had the same amount of time
3rd options : teams boost captureing the B flag one at a time : this needs 12 players ( 6 aside)
Need any more tips/idears please let me know
+rep me