Six Sided Star re-design idea
First, a buff to Six Sided Star’s potency, so that it hits for the exact same potency of any two normal GCDs, to make Six Sided Star damage neutral. This will give the Monk the free choice to either use three normal GCDs, or use one normal GCD and Six Sided Star, as the two options will have the same damage potential.
Making it damage neutral will, counter-intuitive thought it may sound, be inherently not neutral, just due to the timings of Twin and Demolish (otherwise being clipped short). (This SS would never be permitted to let Twin drop except on Twin if and only if there are no Chakra spenders to be used in that lull, nor to cause a late Demolish.) Moreover, with it having a 10s PB-but-better attached via Celestial Fist, it's already allowing you to drop further low-ppgcd skills, just as PB itself and Blitz do, which means you'd want to rotate it as often as you could. Your high-SkS rotation might end up something like DK-Twin-Demo-Boot-SSS-DK-SSS-Boot-Twin-Demo, which would make MNK feel slow af. (Remember that BS and LF auto-crit, so they're effectively 315 and 393 ([320+465]/2) ppgcd, respectively.)
Moreover, why make a disengage tool so powerful? It'd then become a matter of just not using it within one of our 9-step rotational strings in order to leave room for a forced 1-GCD+ disengage or, depending on SkS, within the same string as a Blitz (especially a Lunar one).
I'd honestly really rather have this remain situational but just less clunky.
My idea is some thing like the new Anatman could be more effective than Perfect Balance, but have a much larger CD.
for a example... Anatman grants six stacks of anattā, each stack the same as Perfect Balance stacks, but also with the Formless Fist effect...
I think this would feel less nuanced and integral without even being any stronger, as we can only milk LF's higher filler ppgcd so long without refreshing Twin or Demolish anyways.
At present, Blitz is just long enough to optimize Twin and Demolish perfectly (so long as one never clips the GCD and is at a ~1.94s GCD or less). It fits great. The problem is simply that the 40s CD on PB makes you want to hold for a fresh DK-Twin-Demo string... which would then force you to delay the PB cast. I'd have to spreadsheet it out, but I suspect a ~30s CD would remedy that.
for a example... Anatman grants six stacks of anattā, each stack the same as Perfect Balance stacks, but also with the Formless Fist effect, and a high enough duration, that the Monk can use three stacks, use a Blitz, then use the other three stacks, and use another Blitz, to gain both Nadi, and jump straight to the third bigger Blitz.
This would merely trade a desynced 1st TK/PR for a either a desynced 2nd and longer lulls in core job actions, I would think.
I'm also not sure why we need to have TK/PR within the initial raid CD period (instead of merely at the 60, 120, 240, 300, etc., marks). We'd merely be balanced around that slight potency boost, after all, while the slightly more backloaded damage seems to better fit our identities. Unless you make Blitz available every 20s, which would then gut much of its nuance in optimizing Demolish and Twin (or, seen from the opposite end, LF filler between those two), you're going to have at least 1 in 3 RoFs without a TK/PR simply because TK/PR is only 1 in 3 Blitzes.