NIN is your primary subjob for almost everything. The only time I change subjobs is to go /dnc for dynamis procs, or /rdm for Charged Whisker.
Level whatever you want to 30, then Dancer and Ninja, and if you ever care to do Charged Whisker burns, Red mage.
Also, since we've already necrobumped this thread, I may as well go back and correct this.
Another annoying one will be Actinic Burst since it is only avail in Abyssea in the form of a T2 VNM (apparently not very soloable)
Actinic Burst is actually used by the tier one VNM in Misareaux. I solo'd him without effort or issue back at level 90, and you don't even need an abyssite upgrade.