I've done the quest, I have the levels. Now I just need to pick sub job for my thief.

I'd like to get redmage as a sub, but I've heard you might not get invitations that much to parties on higher levels ( since some people are so very picky). So which would be better: warrior or monk? ( and why?)

I might still take red mage anyway, as I'm not having too big hurry in levelling as I'm just trying to enjoy the game instead of leveling obsessively. Still, I'm wondering.