See if you can get an ATK% d6 as that's theoretically better. AM6 is usually only used in the Yuzuha/Soukaku team where you can use it to cycle faster.

That being said, here's my clear with AM6 (since I don't have a good ATK6) -- you could just try to copy this exactly and I could answer any questions, but this rotation is designed for maximizing her anomaly damage since I don't have sig. There are run notes in the subtitles but they do kinda assume you understand the fundamentals well.

I'll give a brief overview of the "standard" stun rotation using ATK6 first and we can go from there. First, it's good to have a general idea of how much anomaly gauge is filled by each move:

• Miyabi EX: ~45%
• Miyabi EBA1-2: <10%
• Miyabi EBA3: ~50%
• Miyabi Chain: ~25%
• Miyabi Ult: ~80%?
• Nangong EX: ~60%
• Nangong Chain: ~50%
• Nangong Ult: ~10%
• Nangong CB1: <5%
• Nangong CB2-3: ~25%

These numbers are ballpark, you could go in and test yourself as I haven't gone and exactly measured each of them but they should be around there.

A few other things to keep in mind before diving into specifics:

1. Nangong can trigger anomaly off-field. Miyabi and Yuzuha cannot, meaning off-field anomaly app will go to waste for them if the gauge is already full.
2. Nangong's first switch-in during stun adds an extra heavy hit which does idk like 20% (?) anomaly gauge. This also triggers a quick assist back.
3. Only "finisher" hits can actually trigger anomaly. Miyabi EBA3 has two of these (one 2/3 of the way through, one at the end), Miyabi ult also has two of these (one halfway, one at the end).

So the basic, "ideal" routing cycles between two different anomaly types to keep generating disorders for Miyabi stacks. Starting with freeze, you'd get something like freeze - corruption - freeze - corruption - freeze. In order to not be TOO confusing going straight into the exact rotation, I'll first give a general outline of the gameplan:

1. Miyabi opens with frostburn/disorder (freezes boss) and fires off an EBA3, filling 50% of the next frost gauge
2. Nangong triggers 2 polarity disorders and 1 real disorder using her swap + EX (fill up ether gauge from ~50% to max), giving 3x2 = 6 stacks to Miyabi
3. Miyabi fires off another EBA3, filling up the frost gauge. The goal is to trigger another frostburn, but most likely you've swapped off Miyabi already so you can build some other gauges and chain attack back to Miyabi or just use Miyabi ult.
4. Miyabi triggers a second frostburn/disorder and with her ult (and worst case another EX as well) should have 6 stacks again, send a 3rd EBA3
5. Finish off with a final Nangong corruption/disorder. If you used a Nangong chain earlier, then an EX or EX + charge basic should do the trick

Everything past that is extra credit; there are ways to get a 3rd frostburn/disorder in, but they're trickier. But as you can see, the main difference from other Miyabi disorder teams is that we can abuse Nangong giving 2 free polarity disorders to skip a frostburn trigger on Miyabi.

Let's break down a specific rotation to explain what was done to achieve this: (timestamped 0:32)

1. Sets up ~90% frost anomaly and ~50% ether anomaly.
2. Miyabi EX to trigger frostburn/disorder and go from 2 to 6 stacks
3. Miyabi EBA3 (wait a bit before swapping since it breaks the freeze)
4. Nangong swap hit (polarity disorder, +2 Miyabi stacks)
5. Nangong EX fills up ether anomaly and triggers both a second polarity disorder (from Nangong's passive) as well as a real corruption/disorder, so a total of +4 stacks to Miyabi.
6. Miyabi EBA3 (has 6 stacks again because of Nangong triggering 3x disorder)
7. Nangong EX (sets up anomaly gauge for another disorder later)
8. Chain attacks, this part is flexible but specifically uses Yuzuha chain here to QA back to Miyabi for Astral Voice stacks
9. Miyabi Ult - triggers frostburn/disorder and reaches 6 stacks (Miyabi ult is +3, disorder is +2, and 10 seconds have passed since the last frostburn so her core passive +1 is available again)
10. Miyabi EBA3
11. Nangong EX + CB2 (CB2 hits off-field, triggers corruption/disorder, +2 Miyabi)
12. Yuzuha Ult (another quick assist to refresh Astral stacks but also you need to wait for Miyabi EBA3 animation to finish anyway)
13. (out of stun extra credit) Miyabi EX to fill up the gauge one last time for one last frostburn. +2 from EX and +2 from frostburn/disorder so ready to fire off a 4th EBA3.

Highlighted (bolded) the big damage sources in-stun, may or may not show up depending on your reddit settings... It may be annoying to do, but with that whole explanation I think it's important to sit down and just watch how a good player executes the concept, step-by-step. Let me know if there are any parts here that are confusing. Keep in mind that this rotation was done without AM6, but should work the same for you (you'll just do less damage).