I thought that, but either way he had really low crit, because not one of his equipped items had critical rating, all power+surge, so is there a reason for this?
a lot of assassins have 0 crit, just power/surge. As others have mentioned, recklessness gives you 2 charges of an auto crit basically. With all willpower augments, then power/surge only, and all the datacrons, you can usually get crit rating to ~25% with 0 actual crit stat.
Also, if you go to askmrrobot and build a toon with specific gear/mods, you can see where all the stats will be at.