Since this is the combat thread, and you clearly have the spec down, could you maybe give the community some feedback as to what you believe you do differently than everyone else? Clearly, assassination pulls ahead (when ilvl and trinkets, meta are all equal) for the average player. Maybe you could help some of us lesser experienced with combat better understand your success. I just tonight completed the 4pc and tried it out for the first time this tier, and it seemed like my fingers were going to fall off, and the damage was okay but not near what I saw as assassination pre 4pc. I'd be interested if you discovered any tricks along the way for certain fights to improve edps. Thank you.
I can confirm Tiitch knows what hes talking about, 13/13 hc guild and rank 1 on WOL for 10 hc/norm on nearly every fight last few tiers as combat (he's on my server and well known so checked his gear when I considered going to combat), you do need very good ping to make the most of it and there is alot of factors that can massively impact the final dps score on a given fight, the problem with combat though imo is the spec isn't rewarding enough, a perfectly played combat rotation is on par with a perfectly played assassination rotation however assassination is 10 times easier to pull off.
Pooling energy for insight, knowing when to stack or stagger SB+adr rush, knowing when to hold off on other cds and wait for killing spree (20secs left on cd or below), right time to reveal strike, lining up trinket procs with insight levels, managing SnD so you ALWAYS refresh it on zero insight level, consistently having sub 40ms, being in a guild strong enough to attain a 530 item level + 4 set, etc etc.
The problem is unless you can pull all of this off every raid then assassination will be a stronger spec for you, only 1-3% of rogues will get to the point where combat beats out assass or draws level for them this tier imo.