Savescum to hell and back, while in that area.
I got just a modicum amount of stats stolen, and most of that was from the Tormentors (since I wasn't sure what part was story-needed).
On a side-note, even being at actual max level & undrained stats, enemies still wallop you, so you gotta find decent equips and skills to survive, even bordering on exploiting the game. Verdean Roots is a decent start, since basically no enemy (not even bosses) are immune to its special 2-turn stun, so it's good to spam that shit whenever you get the chance, or even use a strat mentioned above with some other Niht skill (that I haven't found yet) that can also put enemies to sleep.
Teary should probably consider putting some more status immunities on bosses at least, if you can perma-Stun bosses, your game's kinda broken.