Makes no sense to make it private, might get SOMEONE good..before you invited me I ran into 2 guys who were pretty good. We should have FR'd that one guy on our team during the heli run because he was a great medic...was like Voood Kahhhh or something like that..might have been Voooodka Ak
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Just some tips from my experience:
Use the medic support kit, you can't trust randoms in this game and if you don't have a good squad/or a squad at all, you are done. Medic kit will have a lot of ammo and you can heal yourself...and also you just get a ton of points, so a ton of upgrades, and you can pretty much carry an entire attacking team in rush by keeping near your team and reviving them. Although I would recommend just running over there, so be close, but not with them. You will also get a lot of flanking done by that. (Sort of just hitting the entire blob of fire going on from the left or right side.