You leveled up THM to be a healer, but neglected your CNJ? I'm sorry but that's laughable. No tier 2 buffs (especially Stoneskin II). No Cure III. No Chainspell. No Roaming Soul. I certainly wouldn't have invited you to heal. Not only that, but you should've seen the writing on the wall when CNJ got Curaga and Rebirth. You've had a long time to level your CNJ (which you should've done as a subclass already anyway). Even setting that aside, you can get your CNJ to 50 in a day if you really tried, or a week or two extremely casually.