Send out three meatshields, Crazed Whale and Island Cat against Capy. Once all Capys are defeated send out Awakened Bahamut to finish the Sunfish Jones off.
An alternative method is to use CatCombo "Saucers" (Bird Cat, Crazed Bird Cat) + "Fall in Love" for a twin Massive Damage combo, and quickly kill the Capys with Tropical Kalisa or Divine Thundia, then have A. Bahamut and another heavy damaging unit. (Kasa Jizo highly preferred) to kill Sunfish and quickly take down the base.
Morning Rush Hour Walkthrough provided by The Cattle Bats