I have a corsair3 too (sw3-p1-c3-shinobi), I use it mainly for farming, but I’ve yet to see a video with actual numbers from C3 skills on crit.
It’s too soon to judge, it really depends on how much corsair skills are affected by crit attack (so, damage gain on crit).
For that reason, at the moment I have to agree with @celexample: the gems haven’t been upgraded at all, so red/blue add very little on end game weapons.
So, unless they buff gems or nerf the overall impact that weapon damage have on damage dealt, socketing green gems seems more reasonable.
