I'm a relatively new player who started about two or three weeks ago. I've finished killing the abyss' boss at the bottom for the first time and am at the second loop. My characters are at level 22 and I was just wandering where's a good place to level. Haven't beaten the two boss monsters at B2F yet since they both keep pwning me.
The mobs in B1F and the Den of Earth only give about 100-200 exp. The Ancient Mausoleum gives about 400 exp but I don't want to waste Fortitude. Enemies seem to be doing good damage to me, but I can't unify my equipment since the game says I need equipment of similar rank and the random loot drops always give me shit.

Also, what team members are good? Pic related is my current team since they're the highest levels, but I've also got Adam and Debra (don't know if they're good or not; never used Adam since I got Yekat before him)