Your typical Mute Hag is a 14HD Monstrous Humanoid that is both blind and mute. They supposedly only exist to make unhappy things. They dedicate their lives to spreading misery and strangling joy.
With that in mind, I will highlight their ability that I wish to, I don't know, synergize with...? Or expand? Anyways, this is the ability I am hoping to play with:
Shaping Touch (Su)
The touch of a mute hag twists flesh like clay. As a full-round action that draws an attack of opportunity, a mute hag may change the appearance of a grappled or helpless victim. The effect acts as a permanent alter self spell. Unwilling victims may resist the transformation with a DC 21 Fortitude save. A mute hag allowed to work for 10 minutes may also increase a victim’s age category by one step; doing so does not grant mental ability score boosts but does inflict physical ability score penalties as normal. Creatures that are affected by this power or successfully save against it cannot be affected by the same hag’s shaping touch for one month. The DC is Charisma-based.
Now with the Mute Hag being blind and mute, I was looking at psychic magic... particularly the Material Manipulator Mesmerist. I don't really like that archetype, but I figured it was quite fitting in function and flavor. It's Charisma-based, and Revision is basically just an expansion of Shaping Touch. It seems it could be used in a beneficial way, which is interesting.
I was also thinking about the Vivisectionist's Torturous Transformation... but, for the life of me, I cannot wrap my head around a blind Alchemist... the formula book could be in braille, I guess... but the actual processes seem like something you cannot just feel your through like a racoon washing its hands in the mud. Mute Hags have 60' of Blindsight, scent, and the Blind Fight feat... but mixing chemicals in tiny viles with any amount of prrcision seems unlikely, at best. Maybe I am underestimating blind scientist everywhere. She does have at-will Invisibility, so the good old Beastmorph/Vivisectionist build focused on Sneak Attack might work.
I thought about focusing on her grappling, but that just seems so... boring. And, she is Chaotic Evil by nature, so Charisma-based Monk is out. Regardless, she will probably be given 6 more racial Hit Dice (for a total of 20)... then class levels will just overlap her racial HD. That way I can give her all 20 levels of a class, without jacking up her HD sky-high. She gets 3 more feats with that additional 6HD, so I could give her some grappling stuffs... if that is found to be absolutely necessary. She will get the monsters with class levels stat adjustments, so that can be applied in whatever way fits best with whatever class.
Is there something else I am missing? Maybe an AntiPaladin with disfiguring Cruelties, or something?
if your going for a horror npc that leave her victims mutated. i would like to point out the rule that sleeping or unconscious targets are considered willing targets and auto fail their will saves.
so maybe a slumber hex witch or something else that can knock targets out (sap adept + master feats along with sneak attacks?) think of the horror the player would get when you tell them "it all blacks out" and have them waking up to their new forms ( make sure the players are ok with this style of horror before doing stuff like this, some might have issues with it's rape like motif - having their bodies taken liberties of while sleeping )
Absolutely a horror NPC that leaves her victims mutated... yes.
I was, however, hoping to avoid using Witch, as I already have a Winter Hag with 10 Winter Witch class levels... and all 10 Winter Witch prestige class levels. They can't ALL be witches, even though they are all Hags. I also have a Dreamthief Hag with 10 levels of Sorcerer and all 10 levels of Souldrinker. Eventually, I will have each of the Hags decked out with class levels that "make sense".
The Winter Hag/Winter Witch/Winter Witch combination just makes sense... the sort of sense that no other combination possibly makes any more sense for a Winter Hag. Lol. My Dreamthief Hag/Souldrinker is in the soul trade business, and all the Soul Bind/Create Soul Gem/Trap the Soul spells are only on the Sorcerer/Wizard list(s) and the Witch's list... trying to avoid reusing Witch, I chose Sorcerer... because I secretly hate Wizards.
I also ended up with an Annis Hag Cleric after running Kingmaker. The AP called for a level 14 vanilla Cleric Annis Hag... I made her a Divine Paragon Cleric for 5 levels, then all 10 levels of the Evangelist prestige class. It may not make the most sense, but I don't really feel like changing The Knurly Hag... she has become a legacy character I plan on reusing, as-is.
Back to the Mute Hag and her Shaping Touch stuffs, though. I could easily give her Leadership, and have her cohort use your aforementioned tactics (Slumber Hex and/or Sap Master)... I think it was Eaters of the Dead/13th Warrior that had the blind witch being led around by a child with a special fur cape she recognized the feel of. The Mute Hag, herself, will not be incompetent, by any means... but it could be fun to give her some special backup.
The Material Manipulator Mesmerist gets access to pretty much all Transmutstion spells of 6th-level and lower, which they can cast as psychic spells (which can be casted whilst both blind and mute). I was just going to have her go all Monstrous Physique/Deathsnatcher if engaged directly.
When all else fails, Deathsnatcher...