Per the title, I added something to the Atro imp farming method to ensure it one-shots Altons. This addition causes little or no time loss on regular imp waves.

The current imp farm method looks like this:

• Atro DE set to "Auto" equipped with:
  • "End of turn effects activate at start of turn instead" enhancement
  • Sacred Crystal
  • Phantom Gizmo/Eremorn's Aegis
  • ~3300-3400 base ATK before spheres if using another unit's LS, unimped should be fine if using Atro's LS
  • One of the following:
    • 2.5m Elgif
    • Demonic Victory Song lv4/5 Elgif
    • Global only: Ophelia or Carrol lead
    • Global only: Miku lead Victory Song Elgif/Demonic Victory Song lv1
• Any additional units used for LS set to guard if in global. In JP, additional units can't be taken, as autobattle can't be configured individually.
• A friend unit set to guard in global will not slow down the run at all, so you can still gain honor points.

This method consistently oneshots all the regular imps with a BB every turn, with 100% reliability on BB being ready every turn, even turn 1. Because it has no player interaction required, it can be used with the automated quest repetition function, which heavily speeds up the run time by skipping menus as quickly as possible and not needing the player to Fujin anything.

However, the problem with this method is that Altons will not be one-shotted by Atro - in fact, I don't even believe it's possible outside random crits due to the heavy sphere constraints.

So I decided to fix that, and make this method not slow down against Altons.

The addition is the following:

• Max Imp Zephyr:
  • 100% ATK sphere
  • Shiny Anklet

Set Zephyr to normal attack after Atro's BB. Zephyr will deal about 45k damage to light units and hence one-shot Altons. This works without slowing down the run because Zephyr's animation time is significantly faster than Atro's (Zephyr's animation is 19 frames faster, just under a third of a second). It's not 100% reliable on the speed aspect purely because of the random delays in global autobattle, but Zephyr should usually match up to Atro's speed even then, and the potential time loss from that is made up for by encountering even a single Alton.

Zephyr's damage here is probably overkill, but it's better to be safe than sorry. It's likely he'd deal enough damage equipped only with Sky Harbinger.

Edit: For the Zephyr-less players out there, mathematically speaking this should work with a breaker Mifune, max imped, with Sky Harbinger and Shiny Anklet. It works out slightly slower for regular imps than solo Atro/Zephyr Atro methods, but encountering an Alton still makes it worth it.

As a thought experiment, it should be noted this run is not the fastest run possible in global. However, beating it currently requires a player to have 4 Zephyrs with max imps and ES unlocked and hit count or 150% ATK spheres for all of them - basically, enough damage to push each Zephyr past 750% damage on normal attacks.

That would let you build a 4 Zephyr squad with a Magress lead (Set to guard). The Zephyrs would be able to kill all imps with normal attacks, similar to the Mifune videos we've seen from JPBF.

This would only be 0.2 seconds per run slower than 4x DE Mifune. The problem is getting 4 Zephyrs.