Seems like there's a lot of distinctive roles here. From watching competitive play it seems to me like what you really need are good versatile players that fill one of two roles. Slayers, or objective. As much as it's great to have an awesome sniper, that player also needs to be a good shot with precision rifles and be good at calling out positions to his teammates so the team can identify roughly where the enemy will spawn and know how many players are alive at all times. If you're going to have people fill exact roles like cqc, you'll need to have someone aggressive who has good situational awareness and know when and when not to challenge. This is just from what I know from 4 v 4 though. What is the player count for S v C by the way?