You're better off soloing CNJ instead of WHM. Your attack magic is stronger as CNJ, also being able to equip abilities from other classes is nice solo. Honestly, if you have a stockpile of leves, and the rested bonus, leves are probably very effective for leveling at least to rank 35ish. Not only do you get exp for each kill, but you get about 2K for each leve you complete...and a refill of HP's/MP after each leve complete which usually means you spend very little time resting.


That being said, CNJ/WHM never has trouble finding a group...usually exp parties are BEGGING for healers. So your fastest method is probably go out and do a couple leves, but throw your 'seeking party' flag up. People WILL find you and invite you.