Sam needs to reach some specific SkS tier in order to perform optimally, I'd recommend going for roughly 685, since it makes you reach a 2.14sec gcd. Tho for now I'd recommend you to not get too carefull about this until you get to ilvl 470, since upgrading gears will usually shift your stats by a lot.

If you want an idea of what to prioritize :
Item Level >>> SKS (to tier) >> DH > CRT = DET

hope that helped