Do the MSs that you get from T20 4p use your Shattered Defenses buffs? If they do would it be at all useful to do charge->warbreaker->rend->BC->BS/Ravager as your start so that you can guarantee follow up that with CS/MS (in BC if using ravager). This would also let your first CS shave off 3 secs from BS/RVG.
If the using bladestorm those extra 3 secs could get you to a faster CD as you usually waiting on BS while BC is ready. If doing Ravager/CoF it may not be as useful as usually waiting on BC. If Warbreaker also procs 2p bonus then this is probably all a moot point.
I guess another questio ill add here as well.
Often during execute phase my first execute will proc tactician. Should i use that CS for the second execute or go ahead and execute 2nd time then use CS for EPx2 MS? If i have CS up before first execute i will always use it there.