personally i have choosen to do both wis and int to the final step not maxing either one the way i figured it haveing less hate and being able to cast longer before i ran out of power would both be good on long long fights
For a warlock, Str and Agi own all. Wis would be my third choice, but it is NOT as good as 10% reduced casting times, and 12% reduced recast times of the AGI line. And to be honest I prefer the STR line crit chances over wis too. Catatyst + Apoloypse = exactly that.