One thing to note is if you don't have a MNK DRK is a little nicer due to delirium providing the int down debuff.

If you do have a monk pld is nice for str down debuff and still get int down debuff.

Drgs work nice with Drk
Mnk works nice with Pld
Nin works nice with War.

Just nice due to rotations and debuffs supplied, not at all required.