The current max pool of tertiary stats without augments is 600 (correct me if I'm wrong). In order to not miss anything, you would put yourself at 300 accuracy, 300 surge, giving you 76.3% critical bonus. On the other hand, 0 accuracy would give you 600 surge, and 80.3% critical bonus. The ideal value for accuracy is probably somewhere in between those, but testing that would be extremely tedious and the difference in dps would most likely be very small. I use 10% accuracy because I like the idea of always hitting.
Note that if you are ever going to use lethality, I would recommend approaching if not reaching that 10% with accuracy as weakening blast is a ranged attack, and missing that would be something of significance.
Cull is also ranged. Close to 100% Ranged Accuracy is probably a good idea.