Thats reallyt interesting, Vader, as my strategy is completely the opposite.
I try and engage the enemy at long range using fast auto snipers or assualt rifles.
Each of my team has a pistol,mp5 or P90, an assualt rifle such as the tavour or HK416 6.8mm and a fast firing sniper such as the g36 sniper version(forget its name) it has a to ready of .31 and accuaracy of 71.
I try and pin the enemy down with my assualt rifles while my snipers aim their shots and fire. Seems to work good for me
I like having 6 team members as it gives me more options in a fire fight.
I hate indoor fights at close range as I always seem to get caught by grenades