I would think potency but I have been wrong before. In the heroic aa tree I have a 6 in ablity mod and 10 in int, str etc.. Thinking of doing lightning reflexes and potency next tree. Figure hit hard and fast is better then the bonus, would that be right? Been doing more raiding and have some decent gear one peice of rygorr and a bunch of the havoc stuff from ring wars. Looking to get the rygorr boots tonight for the apocolyps bouns.