It seems like getting raped over and over again in the goblin den makes you level up super fast. If you don't attempt to escape (it's kinda hard to tell how the game discerns this, sometimes you get punched even if hanging around the human fire place), you are basically fed and receive no HP damage. Lona will fall into max depression pretty quick and her stamina will be capped at around 50-60, but if you get lucky with resting between the gangbang (optionally prostitution, somehow goblins are willing to pay meat to have sex with their sex slave), you can get gangbanged 2-3 times a day + ensured end of day gangbang (dunno if that gives you xp). It's kinda repetitive but it sure beats repeatable quests and maybe going around looking for attackers to kill (it's more fun tho).
I started with the combat expert build at ~lvl 20 and if iirc, it gave me gave me like 7-9 levels in an hour or two but I'm now kinda stuck because I picked the cave of Missing Daughter to do it and it's quite hard to escape from there. I'm probably gonna give it a more informed try, by basically depositing all valuables at the Bank, have Cecily and big boy escorting me, sneaking out of gate, to the whistling tower and then disband (only place I managed to escape with the shackles), remember the escape path and then grind the level. For return, just gotta luck out with the randomly generated beggar clothing pieces and with making the way back through the cave.
Anyone else has done this?
Also, I guess this is a neat trick, when you are on a mission with a enemy spawn timer and have Cecily and big boy, if you can find a choke point with a single tile entrance, you can create sort of an entrapment around the tile adjacent to the entrance with big boy facing it, Cecily on either side and then you get someone to follow you, go complete the encirclement and the pursuer will get hit from three sides at once. For the Cecily rescue mission, you can clear all the bandits, their reinforcement and earn XP and a couple of large copper coins that way even at low level. For goblins there isn't much of a need because they are kinda weak at that point, but you can still do it.