Getting to DRG/BLU..

[Laciante]

A sub is absolutely necessary.
I leveled my WAR to 37 (old cap) almost entirely /RDM, and my RDM visa versa. Of course this was some years ago, when it was more or less ok not to fit the norm, and just play for less efficient fun. I would recommend using /MNK for getting through WAR.
It doesn't matter much, but since I don't like axes, I leveled WAR using spear and sword - marginally less effective than GreatAxe, but you will not have to work as hard getting those skilled in earlier levels on DRG and BLU.

So, WAR to 18, MNK to 15ish, subjob quest, run WAR to 30, pick up SAM, NIN, DRG and BLU, get SAM and NIN to 49 (both can use WAR sub) honestly, you won't need it past 60 anyway (/SAM gets Hasso at 50, Meditate at 60) of course, completion is a nice feeling; so now you can party with DRG and BLU, using /WAR in lower levels, DRG/SAM starting around 50 and BLU/NIN once you get Dual Wield at 20. I have heard THF is useful sub for certain BLU setups, but I can't stand daggers, so I've never picked up THF past 15 for TH1.
DRG/mage is an excellent soloer, especially after lvl60 and picking up the artifact helmet, but like I started with, I didn't lvl my RDM sub "properly" and I'm too impatient to play WHM