[renowner]

I believe that the two passives Spirit Well and Pain Tolerance need a buff. Spirit Well from Grand summoner, a promoted class: Is +18 FP total at max rank (5). Ghost's Pain Tolerance; also a promoted class: Is +48 HP total at max rank (5).  The amount given is next to nothing. And a base class, soldier, gives 75 HP for 5 points into their Tenacity passive. None of these are main class only.  Bonder's stat boosting passive only requires THREE ranks and gives +3 Wil (Worth 15 fp) and +3 Faith (Worth 6 FP) Meaning that not only do they get stat boosts, which are better. But unless you're already overcapped you're gaining MORE FP from it than the grand summoner passive, for 60% of the point investment into the class.

My ideas:  
For ghost: Make the passive worth 75 health the same as Soldier's. They already have Rising Game, and +5 res from anti curse. So it doesn't exactly need to be that much better than soldier's. But 48 health is very not worth it for 5 points. (Or just make it +40 hp but only require one point.)

For Grand Summoner: 
1: Change it to be worth 10 FP per rank, +10 for max rank. For +60 total. People can already get +25 FP for capacity, and this would roughly equal a tannin's enchantment.
2: Change it to just be a stat boost. Bonus Faith, maybe. 
3: Change it to be a different kind of bonus. Like increasing your youkai slots by rank. So low faith builds would still be able to have twelve youkai for grand summoner. (If you go this route, maybe reduce its max rank to 3. +5 youkai slots is pretty powerful. +3 is also pretty powerful.)
4: Change it to reduce the maintenance cost of summoned youkai, slightly. Which would fit in with its theme of summoning a large number.