You loose 1 defensive cd, you have no flare in 30 and 40 caps, the difference in int/vit in 30 and 40 not even noticable, you gain 3 defensive cds. Even in 50 caps, Convalescence would proove useful, the stats are the same on gear for thm as well as blm, it's the same gear, jobs don't add any passives. so what you'll be giving up is ancient magics which I dont use often enough to justify them and manawall. PvP gear has no accuracy stat. Featherfoot was useful as hell against gear with accuracy.