Quote Originally Posted by hamishspence View Post
While charisma is usual for supernatural abilities:

http://www.d20srd.org/srd/specialAbi...turalAbilities



given that Durkon has a "terribly low Charisma" and Durkula's isn't going to be vastly higher, it might make sense to use his best casting stat instead. If The Giant allows vampires use their "best mental stat" for their powers, that would fix it a bit.
Vampires get a +4 bonus over the base creature for Charisma, so +2 is +2. The Dominating Gaze works like a Dominate Spell with a caster level of 12, so presumably it uses the Vampire's "casting stat".