I just want to add again, in case my previous post was not read.
There were no cooldown on spells in the gameplay demo.
Yep. I just an awsening people who believe that or you spam the same attack or you spam the same rotation and there are no other way.... Even with warlock in nwn2(with warlock reworked of course, the vanilla wlk is trash), i rarely repeat the same invocation more than couple of times... And warlocks on 3.5e was supposed to be a "spam" class