So, in essence, you 1 round kill maxwell given the DPS you are claiming. Luna and pegasis are wave 2 mid and can go down 1-2 rounds even without dark damage boost and arguably would fall more in line with "regular mobs". I do alma and maxwell in 6 rounds typically. Even assuming a 50% bump to damage output, that would cut a comparable team (stat wise) down to 4 rounds, so no I'm not really seeing it even with 6 dark units and no healers. Alma would be 5 rounds (trips on 4 usually), but the defense boost forces a 6th for me. Oboro goes down a bit easier in that duo.
Haven't seen Aem or Rameldria in on frontier yet, so not sure about them, but even with the player version of Rameldria, he has a lot of HP.