So i got the results on dummys, me and my friend took a 1vs1 on dummys, and i ended up with 1.1mil dps and he ended up with 996k dps on 60 seconds/1min.
Currently I'm playing on Version 734 of Honorbuddy and the newest version of Demonic.
I dont feel any dps change with another warlock in the party. Maybe thats becuase people uses the auto apply Curse and if another wlock puts the effect on your routine cant track it or something.
I got about 52% Haste, 110% mastery and about 20% crit + Shaman and Immerseus trinkets, i got Glove enchant + cloak enchant.
Compared to him he got about 50% haste and 122% mastery with 18% crit + Immerseus and Garrosh trinkets + he got Glove enchant + cloak enchant.
I can confirm that more haste and less mastery is key in affliction.
All numbers are ~ as i will not be tracked
This is only 1 try, and remember it can be the RNG that is on my side, but his trinkets procced aswell. but i think i got a good doomguard in with 2x13k int + 2x2k int + 4k int pot + doomguard