Originally Posted by
Greatguardian
Idling in TP gear also prevents you from idling in Refresh gear. Outside Abyssea, the loss in MP adds up significantly over time. Not only are you losing MP recovery (1 earring, 2 body, 1 head, 1 legs, 1 hands/feet, 6/tick, or 1,000 MP per Convert assuming maxed merits), but you're spending more MP by taking damage and curing yourself.
If you need all of that MP on content harder than Abyssea, you should never be melee'ing. If you don't need all that MP on content harder than Abyssea, you should be burning the excess off in Nukes and doing more damage, more safely, than if you were melee'ing while still maintaining full casting potency on all of your other spells.