maybe rdm is based around enhancing the sword with elements , fire make insert here 3 combo chain (death blossom) put a dot , Ice make it snare the enemy , earth make it do -10% dmg , lightning make it take 10% more dmg , light rdm gets healed , dark make it blind the enemy.

sam , who knows...a stance for fast attacks that regen tp, another for slow but high attacks drain lots of tp, and u change from one or another similar to BLM but instead of MP ,TP.....