The job adjustments had no impact on whether or not Dancer is used, and here is why:
Every time you use a JA, you incur a forced delay (minimum of 1 second, in practice about ~1.3 seconds on average). I
adjusted Motenten's sheet to model the changes to Ternary/Striking flourish and assign their JA delay to that TP/WS cycle, as well as added JA delay for other things like Steps.
Assumptions:
* 80 delay (~1.3 seconds) per JA. -- This is a favorable assumption because it assumes every JA is followed by a WS. It represents the maximum possible efficiency given server-client transfer times and very probably underestimates the real JA delay.
* A 3 minute fight, which is essentially the most favorable possible assumption for Steps.
* The modeled player was responsible for applying the Steps.
* Berserk, Haste Samba, etc. were all applied at the beginning of the fight, and that Haste Samba would have to be applied twice.
* I used Pyrrhic Kleos and Climactic-Rudra's as my two test cases. I didn't use Evisceration because I originally set out to test Tier 3 flourishes and they're all fairly worthless with Evisc.
* No build-up time for step potency. It was assumed to be instantly 100% potent, so 10 steps would be -23% Defense from the first second of the fight.
* My own gear.
* One BRD for buffs.
* No skillchains
* Reverse Flourish is an instant 1000 TP for WS.
* Steps are 100% Accurate
Some conclusions:
1) Climactic is the only Flourish worth using before a WS. Ternary, Striking, and Building are each a net DPS loss in most situations simply due to their activation times (not counting the time it takes to get steps).
2) In a buffed situation, Feather Step starts having a negative impact on the DNC's DPS almost immediately. I found that level 1 was a net DPS gain for the DNC, but after that it went downhill. Might have been different if I modeled Evisceration.
3) Box Step is worthwhile until you cap Ratio.
4) With capped magic Haste, using a 5% DW Toetapper Mantle and not using Haste Samba was essentially equivalent to using Haste Samba (-1% DPS) and I'm not even sure that's the most efficient tradeoff. Considering Haste Samba doesn't help SAMs, DRKs (in a 3 min fight), DW jobs, or H2H jobs, this would be a way to simplify your playstyle.
5) Saber Dance is only a net +3% DPS. Given that you don't really need Haste Samba (#4), there will be times when Fan Dance is a more reasonable option.
6) Reverse Flourish is definitely worth using if you don't attribute any of the delay from FM generation to it (80 delay). If you attribute two JAs worth of delay (160) to it, it's still minorly worth using. Three JAs (240 delay) make it not worth using anymore, so you basically should never use useless steps to build FMs for Reverse Flourish, because you'll always need at least 3 JAs (Presto + Feather Step + Reverse Flourish or Step + Step + Reverse Flourish) to get a full WS worth of TP back even with Terpsichore.
Disclaimer: It is possible to precharge Presto, Striking Flourish, etc. when moving between mobs so the JA delay is effectively negated, which I do. I was looking to evaluate the changes from this update together, though, so a 3 minute fight is really the best place to do it.
Does this make the problems with Dancer a little more clear? In the ideal group-event case outlined above, you use Box Step-> WS until you cap it and mix in two Box Step -> Climactic Flourish -> Rudra's Storms combos and as many Reverse Flourish -> WSs as you can while you have free FMs. You use Feather Step at most once. You probably don't use Haste Samba or Saber Dance unless your WHM is on top of their stuff or you're doing an event with a WAR or DRG. After you max out Box Step, you just sit there spamming WSs and not using any of your Dancer specific JAs.