Yeah, I could probably dump CHA and increase WIS by 4 points though I don't really wanna restart now only for this reason.

After all, it's maybe not so strange that a battle-oriented monk/alchemist has more INT than WIS.
I put 3 points in STR while progressing in levels, my monk/rogue has level 12/3 now.
Yeah, those ethereal ability and +20 damage reduction at levels 19 and 20 will boost my monk a lot as well as 1d20+6 base damage at level 21.
Enhanced Caballus and co. from Undead Targos mod complicated my life casting on me Berserker Rage and Ray of Enfeeblement. One time I waited more than 20 rounds (I had time to run away a bit after a sneak attack and hide but was affected by the Ray of Enfeeblement down to STR=-4 lol

).
Fortunately, monk gets some resistance to spells at level 13. There is an item in Targos giving the immunity to some mind-affecting spells but I don't have enough money yet.
Tc, Yigor