Originally Posted by
Icyheart
Are your abilities trained to max level? How much ArP are you at?
Also, your opponents might be BiS geared and sitting at near resilience cap, which is common for priests whether they are disc or shadow. That may be why they are taking lesser damage.
You should upgrade your many 12 ArP gems to 20 ArP ones.
Your bracer enchant should be the 50AP one (Greater Assault). Can consider picking up normal or hc Toskk's from ICC.
Your legs enchant should be Icescale Leg Armor. The current one (+8 armor?) doesn't help at all.
Pick up a belt buckle and swap out the expertise gem for more ArP.
Your boots enchant can be upgraded from 24AP to 32AP (Greater Assault) if you're not keen on using Tuskarr's for the movement speed increase.
Despite the many changes to make, your damage should be fine on targets around your gear level, especially when both trinkets proc. Try making more use out of shadow dance (Ambush ->Evis->Ambush->Evis, rather than just Ambush spam). Hope this helps.