Despite having Supression to make up for +hit, it's still a good idea to stack as much +hit as possible as the majority of your damage still comes from Shadow Bolt even as Affliction. Supression does not affect SB as it is a Destro Spell. Therefore, what i am putting in mine are the +Spell Hit/+Sta gems. Vivid Chrysoprase. You should also consider Great Lionseye, +10 Spell Hit, for the yellows instead of +8 if you are not at the +Spell Hit cap of 202.
Until you are at 202 Spell Hit, you will get more DPS out of raising your Hit than anything else, including Damage. All the Spell/Shadow Damage in the world does you no good if your missing bosses.
Also, if you do not have 20% Crit and around 1000 +Spell/Shadow Damage, you will not be at you max DPS potential as Destro. Your better off sticking with a Demo Raiding build or a UA build.
Edited, Feb 27th 2008 6:48pm by Lathais