Transformation-based caster class (possibly a melee caster, there were threads about it in the past but think in the vein of Vincent Valentine from FFVII) and either Chemist (non-caster healer) or Necromancer/Hemomancer (dark-toned healer) for Healer. Last physical ranged to bring all classes to four jobs each, I'd lean toward something like Jester/Juggler/Clown. Pelt enemies with a bizarre collection of projectiles in humorous ways.