Coral Lake East has some fairly easy levels to run, so clearing without a wingman is simple enough. If you have a high-level/evolved dragon, "The Bloated Anomaly" can be beaten in about 1 to 2 minutes a run. If you want to pair this with
Then "A Recruit's Duty" can be easily "A"-ranked by the Blackbone. It helps, here, to have taught the Blackbone a vision attack, like "Roar Photon", to speed up the killing of Vespins.