
Originally Posted by
Renathras
Bio II had the same cadence as Biolysis today, so we can consider that in parity. 30 sec duration vs 30 sec duration, nothing really to discuss. The big changes (to the GCD cadence) were the following:
Miasma 2.5 casts per minute were removed.
Ruin II at least 1 cast per minute was removed (I say "at least" since even with 2x natural Bio II refreshes for AF oGCD weaves, you'd need one more. Remember that Broil at this time did not allow weaving without clipping. It would be more than 1 per minute if you were needing to weave more things). Ruin II was also niche useful as a MP management tool owing to the lower MP cost vs Broil III, something that is not shared with EW's Ruin II vs Broil IV. "At least" 1 is due to needing to burn at least 3 AFs per minute (for Faerie Gauge - lol - if nothing else, and obviously burning with ED since you don't want to leave that potency on the table), though this could be higher depending on whether or not you were able to use natural Bio II refreshes for oGCD weaves and that SCH also has a lot of OTHER oGCD weaves besides just AF.
Miasma II was a single target loss against Broil III and only situational as a replacement for Ruin II for movement or weaves. So we can say it's here, but it kind of also wasn't EXACTLY part of the GCD cadence and is more properly looked at, in a general sense, as a wonky version of Art of War. Still, you could trade that "at least 1 cast per minute" from Ruin 2 down here for hyper-optimization. The MP cost was so prohibitive that this would often be passed up for Ruin II anyway.
...short list, but actually more significant than it seems. As I noted above, unlike WHM, there were no replacements for these "at least" 3.5 GCDs per minute, so they were shunted to additional Broil casts. Broil IV allowing oGCD weaves also removed Ruin II/Miasma II's use in single target situations away from being optimal parts of the rotation and an MP management tool for Ruin 2 into being situational for heavy movement (in the case of Ruin 2) or high levels of oGCD weave needs, and in the case of Miasma II, being shunted to a strictly AOE role in the form of Art of War. So while "at least" 3.5 stands, in practice, it was probably closer to 6 assuming weaving 2-3 oGCDs per minute.
Note that this is largely an EW change, not a ShB one, since using Ruin II for oGCD weaves was still commonplace in ShB due to Broil's longer cast time. Broil's shorter cast time today is what really changed things for SCH honestly more than anything else, since Miasma I's removal aside, it altered how many Ruin IIs were used in the standard/general rotation for BOTH weaving AND movement - a 1.5 sec Broil IV allows for a lot more slidecasting, which can handle all but the longest distance and longest duration movements.
Unlike WHM, which filled those "dead" GCDs with 2.66... Afflatus abilities in ShB and now 4 in EW, SCH not only replaced the missing 2.5 Miasma casts with Broil IV, but it also replace a lot of the situational Ruin II and Miasma II casts with Broil IV, compounding the problem even more. And unlike WHM, which got better from ShB to EW, SCH actually GOT WORSE.
...
The actual issue seems to be the removal of Miasma, Miasma 2/Art of War no longer having any use (even situational) in single target fights, and Ruin 2 having a MUCH reduced presence with Broil's shorter cast time.
oGCDs don't affect GCD cadence (for obvious reasons), and since collectively everyone discounts oGCDs (no one counts Assize or using Tetra as "breaking up Glarespam", so the only time ED or the like should count is if Broil has to be substituted with Ruin 2/Miasma 2 to cast them; that substitution is the actual break in the GCD Broilspam, not the oGCD weave), isn't the actual issue.
Indeed, it seems Broil's shorter cast time and Art of War not having single target applications are actually the big changes here. Broil's shorter cast means no need to switch up spells for oGCD weaves most of the time, and slidecasting is a stronger movement utility, removing as much need for casting Ruin 2 instead of Broil. Add in Art of War not being a single target gain over Ruin 2 and you basically eliminate everything other than the two natural Bio refreshes per minute.