The clip you saw probably had a person 4-5 boxing. The main character is separated from the "alts" that are all on /follow to the main. Since they are all following the same person, it makes them look like they're on top of each other. If you're 2 boxing, you will never be following on top of each other. You should have a key bound to your shaman that moves in any direction to break follow though... once the warrior charges, you don't want your shammy walking up to the mob.