Quick update: achieved level 60 before fighting Baal!!!
Quite sad though that to reach level 61 I need something like 99,000 more XP. Even if I get something like 60,000XP from the Baal fight, I only have like 3 quests left to complete, and only item suppression battles left to fight... highly unlikely to get me the extra 39,000XP.
Oh well, I'm not going to worry about that for now, I did reach my target of level 60.

I'll hopefully finish up with this game first and just check if there is a way for me to load a previous save game to make a run for level 61.