@Stwoo I suggest that the front guy is a warrior that focuses on getting as much armor as possible. the reason being that the armory has an upgrade that reduces the incoming damage (before armor) for the warrior. This way, your tank has a significant amount more durability.
@vitya04 use a multi-command that says (enemy - is alive) AND (self - not momentum). This way the damage targets an enemy, while the buff goes on your character.
For people who don't know what sspeed is, it's basically the speed you have that is over the speed limit. This is so you can go back to speed reducing enemies without ruining your speed. I hope this helps.