Finished all quests but can't grind for Judgement items because are not unlocked?

[Deucalion]

It's intended to be this way.

1. Go to Auto Levelup
2. Click on Cactus and start Grinding any amount, doesn't matter
3. Once grinding, click on your quests auto nav
4. Play it through

Andy, I believe this is what you were looking for also... fyi