I got an idea for a tournament where you play 3 different modes:
1 Map BT (First cap wins)
1 Map iTDM (10 minutes with frag limit) or 10v10 LMS
1 Map iCTF (15 minutes, first 3 caps wins)
The team who won 2 maps wins, or maybe if you win BT map you get 1 point, iTDM 2 Points, iCTF 3 points.
The teams can be 5, 8 or 10 ppl and each member need to play at least one map, Random maps (a short list).
It's just an idea, tell me what you guys think, if you have something to add or modify.