What i found do be useful, was actually the simplest plan possible. Stay in groups and use second chance. Treat it like a real elite army unite, by which i mean dont abondend your mates. Also try to seperate the gun catergories. Have a rifle, machine, submachine, and either a sniper or bolt action. Then take a strategic spot on the map and try to hold it for as long as you can. When the other team realizes how to get to you and wipe you out, a new spot is needed, or you can switch spots regularly. This works best with some sort of communication. dont waste nades, they come in handy in tough spots. Try not to all throw a nade at one person. again communication is key. I no i quit the game, but i mite make a comeback im not sure tho. When i did play i used this strategy and it helped me have the 2nd highest level in the clan at the time.(wonderboy was highest)
hope this helps us win some wars