We don't do this sort of personalized recommendations on these forums. Sorry.
I've been following the itemization from your spreadsheet and using the cycle of 4r/4e min with 5r/4e max and I can't seem to get above 4.7-4.8K DPS. Could it be that my rotation is not smooth? I find myself getting energy capped with still a healthy duration of Rupture and Slice & Dice still up and I usually do 2-3 Envenoms before I'm forced to refresh my Rupture. My stats are as follows with the WD/SR as my weapons setup and IP/DP as my poisons.
21/21 [5.25%] Expertise
My guild is also usually running with a good amount of melee buffs. Could it possibly be the fact that I'm not expertise capped that is only allowing me to yield this small amount of dps? Yes there are alot of variables in answering this question such as the buffs that are present, however, I just feel that generally speaking I should be doing 5K if not more with the gear setup I am using currently with "raid buffs". I'm only missing 4 pieces [Cape, Neck, Boots, 2nd Trinket] that are Best in Slot.