According to the SSS dummy hp, SMN is the second highest dps behind SAM. And according to numbers SMN can do more than any class besides SAM. & SMN doesn't suffer more than RDM. SMN gets Aetherflow AND Lucid Dream. RDM only gets Lucid. It's OP in a sense that it has extremely high single target damage potential, gets resurrection and utility as well as high aoe damage.