My ranger character mindread almost everyone in FoV, especially the 15K to 22K mindread costs. Just because of this thread, I grinded and was able to reach Level 47. Note, my ranger has no points in wisdom when he grinded.

My warrior finished FoV as level 46 without trying, so I assume 46 is common. The fact that my ranger was still able to reach Level 47 means that Level 48 is definitely within reach.

Personally I don't like grinding low XP enemies. For the Divinity II series I even felt that when the enemy XP reward drops to below 3K its time to move on to other places... ugh... I just didn't feel good after that grind... I'm not doing that again...