Personally, something like this....
1
2 3
4 5
1 is there as a blocker, keeps his head in and watches for mugs on 2 and 3.
2 and 3 shoot the crap outa everything
4 and 5 lock up and shoot cross field at anything they can.
also....
2 1 3
4 5
Works pretty well
And
1
2 3
45
Thats us all sat round a table in the pub, my personal fave