Cleon
Legend
I'm content with a straight monster here.
The Wis and Cha should be higher. It's smarter than a ghast, which has Wis 14, Cha 16. Since its Int is 2 higher, I'd suggest doing the same with the other mental scores.
Thus...
Str 10, Dex 17, Con --, Int 15, Wis 16, Cha 18
Acceptable?
I was thinking these things have some parallels with arcane spellcasters (they had weapon skills as a wizard and some could cast spells), so could have Int as their highest stat.
Or, to look at it another way, they're more brain than instinct.
We could meet halfway:
Str 10, Dex 17, Con --, Int 16, Wis 15, Cha 16 ?