How to Dragoon Per Second: A DPS Paradigm

[Sleigh]

Okay, so, it looks like:

Ger costs 10s of time.
A rotation is roughly 12.5s (4 moves + HT or Phleb).
You gain 2.5s of BotD per rotation, technically a bit more with some SS/Selene
You have exactly 5 rotations at 0 SS between BotD uses (gets funky with SS)
To last from extender to extender, you need 12.5s. To last extender to extender with Geir within it, you need 22.5s, which means there are rotations you are unable to do Geir even if you have enough time to do X amount within 5 rotations. As long as you never dip below 0 BotD duration you're fine. If you dip below 0 BotD duration within the last rotation, and can activate BotD before your next extender, that should be fine too.

Napkin rotation, might not be true just making it up as I go along a rotation in my head:

If say you start before CT4, you have 27.5s left as of CT4. Can use Geir there and survive to next rotation, for a total of -22.5s, or 5s left + 15s = 20s left. Can't Ger yet before next extender or will drop. Can Geir after next CT4/FT4, as you'd have 22.5s left. At that point you will survive to the next BotB and can just blow Geir right before the next BotB regardless. Should be able to loop that, although the next Geir would be delayed by a little.

You get two Geirskogul per BotD without doing any time extensions.

You only get 1 without extensions, it's a 10s CD on Geir, and a 15s base on BotD. You'd have 5s after your use before you run out, less than the 10s you need.