Thank you both so much. So, here's what I got:

GLD -> 22 for Provoke. Use Cure, Protect & SS xclass to help soloing
MRD -> 26 for all xclass abilities. Make sure to use flash and provoke from GLD
GLD -> 34 for PLD and Awareness, cause it's needed later
MRD -> 30 for WAR
Unlock DRK at 30
At that point, just experiment and see which one I like best, since I'll have the full xclass toolkit.

Thanks again, this was very helpful!