^.^/ Hey hey!
Well, SCH is an all-around mage. So to be good at it you'll want gear with both MND and INT. You may even wish to have two sets: one for MND and one for INT. Personally as a Mithra, I've had my priorities in this order: MND and INT, MP+, and Healing MP+. Of course at higher levels, you'll have access to items with more focused stats like Magic ACC and Magic ATT to play with.
If you grab MP gear that reduces your HP try for items that say 'convert hp to mp' so that you don't reduce the potency of sublimation.
Not much, but hope it helps.
Jobs: 75SCH 61PUP
XboxLive Gamertag: KA Clie