I have been using MM SLA, Boulder Toss, MM, Wiz PL MM, FM as my single target lineup - casting the first one in the lineup thats ready at any time.
I then read that someone else uses Scorcing Ray as well because MM SLA, MM, FM alone leaves a gap.
That left me wondering if adding Scorcing Ray would be a (noticable) improvement - or if casting it would simply delay casting another MM slightly thus cancelling the advantage. More generally I am wondering which rotation is really optimal in terms of getting the most hits/min so I decided to run a small preliminary test. I dont claim that the size of my sample is sufficient but for now it will serve to open the debate. I realise that this is nerding so no need to tell me if you think so.
I set myself up not in Shiradi (to avoid the extra procs) using a macro made with AutoHotkey to cast spells and using dclog to get the data into a file to examine afterwards. Neither Autohotkey nor dclog are needed for this but they sure made things easier. I then found a stationary target and blasted away with a specific lineup of spells. I only counted number of hits - not raw damage - as number of hits determine chances to proc in Shiradi and thats my main metric for this test. When my lineup is ABCD that means that I will cast A if thats not on cooldown, followed by B if thats not on cooldown etc. Hence its not a rotation but a prioritezed list.
With a lineup of MM SLA, MM, FM I got 192 force hits/min.
With a lineup of MM SLA, MM, FM, Scorcing Ray I got 171 force hits/min plus 26 fire hits/min for a total of 197 hits/min using the same method.
So, adding Scorcing Ray into the mix did infact up the number of hits. However, rays may occasionally miss on moving targets and my target was stationary and there is the issue of having different spell power for force and fire as well as different crit items so I am not entirely certain that Scorcing Ray is an improvement.
I suppose I may just have to run a longer test sometime to get more accurate data. Also, if someone has another lineup of spells or even an actual rotation that they believe is better that would be interesting to test as well.