2 dps on the medical. They need to stand at max range and interrupt as much as possible. Best way is to say 1 dps interrupt first, 2 dps interrupt nr. 2 heal and so on. Tank needs to interrupt the commander as much as possible and tank the chief. The commander is shotting random rockets which does AoE, i.e. why dps needs to spread out or stand at max range. Do not hit the commander before the chief is dead, as he reflects damage back at you. Medic -> Chief -> Commander