I'm just glad we can have a meaningful discussion about all this without it devolving into some random name calling fest that this forum is prone for =p
In terms of HPS, yes, there are a lot of factors that can affect it. Note that I mentioned when both of us were out putting 1.2K HPS, we were both getting used to the fight and progressing through it. In total that HPS will be slightly inflated because it takes place during P1 and P2 where there is heavy healing involved. Those values would obviously drop once we were able to account for P3 because P3 healing is incredibly light compared to the prior two phases. With that being said, I still stand by my point that my HPS should never match my WHMs HPS (it probably does help that T13 does feel perfectly structured for Whispering Dawn usage as most raid attacks are slightly over a minute apart) and in part that probably will inflate my number more.
I also understand that every fight will require different compositions and strategies because they are, well different fights. Like how T2 enrage required double WHM, Flames of Rebirth is better for WHMs than it is for SCHs, Odin trial is better for WHMs than it is for SCH; likewise double SCH composition works well for other fights like all of BCoB outside of T2 enrage or double SCH for single tank Ramuh EX. In this particular case, it may just be because of how perfectly structured T13 is for SCH and their cooldowns, putting the spot light on SCHs power.
Though in the end, this discussion is all moot because we're getting EA Heavensward on Friday and servers will be down tomorrow, lol. Though I do enjoy the riveting discussion. *Offers tea to everyone so we can continue the discussion*
PS, why does no one know how to spell my name right? >>;... lol~
[Edit]
This is a unique scenario in the healing world of raids because the heal check for T12 becomes EASIER the higher your DPS goes, specifically when you're reaching the threshold that allows you to reduce the amount of Bennus you have to deal with. Higher DPS means significantly less time in the Bennu phase and thus less Flames of Rebirth to deal with.
The scenario Risvertasashi was speaking of in his example is if a healer dies or d/cs just before P3 starts so now you have one healer solo healing it with only four DPS and probably four Bennus in pre-echo state. That would be much harder to handle on a SCH versus a WHM (though I don't think it'd be impossible).