Question regarding master levels and level sync.

[Alhanelem]

Say you have two people in a party.

Knuckles is level 99 THF, fully mastered with the 2100 job points, and master level 11.

Justine is level 99 WHM, but with only a few job points and not even close to master.

Can Knuckles level sync with Justine to get exemplar points? I know that one or both of them will be screwed out of capacity / job points. And Justine of course cannot get any exemplar points since she did not master WHM yet. But can Knuckles?

Level syncing to the non ML, yes you still get exemplar points, as if you were MLv 0. Just as with XP, EP goes down (from the same level monster) as master level goes up (But at a much slower rate, as a master level is much smaller than a regular one), If you are partying with peoople and there is a significant master level discrepancy (or they dont have it unlocked at all) you should absolutely use level sync. Unless you're near ML30 it probably isn't going to affect your kill speed much, and your EP gain per kill will be a little higher.

The number of job points they have is irrelevant to the EP gain. Master level is the only thing that matters, and again, all non-master-breaker players are treated as MLv 0.