I'd probably vote for SCH, maybe BLM. Since Galka have more strength on those jobs. RDM is already a fight to begin with cause they have lower elemental magic and so you really need all you can get MP/INT-wise to get more tier 3's out and less resists on em.
If you're only looking for something to bring to events than just do whatever is most fun.
On a sidenote: More MP is always better... for any race.
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