I'm mostly balanced but I used to put a bit more towards Intuition (to catch someone lying) then Stealth (to not be killed by Gnosia) and finally Charm (not be voted out after debates)
It did end up with some frustrating loops if either SQ, Otome and Kukrushka were Gnosia where I couldn't convince the others at all (I swear the skill "Regret" and just the sound of it is infuriating for me now, good thing I can use it myself now though)
Charisma is what you want to upgrade if you want to convince others, Performance and Logic are maybe the two stats that might be left lagging behind a little bit but even then they're useful (Performance mostly for lying as a Gnosia/Bug/Ac Follower, and Logic later on especially as you get the skill "Definite Human" or "Definite ennemy")
In the end loops can end up with you being voted out (need Stealth and Charm to avoid that), being killed by Gnosia (need Stealth), without you being able to vote out the proper characters (need Charisma, Logic might help) or... without you being able to understand anything (need Intuition to catch some lies, also to keep alive high level Intuition characters early on like Comet especially and Chipie, Remnan, Yuriko, Gina, and high Logic characters later on like Otome, Yuriko, Chipie, Raqio, later one... if they're not Gnosia/Bug/AC Follower obviously), the skill Definite Human with high intuition is rather efficient to get a good start though (better to use it in Day 1 or 2)
As a Gnosia, keeping low profile, high Performance, good Charm and killing the good persons should be enough.
EDIT : Oh there's an update available for the game, maybe some translation changes?
