Well first I wanna point out cus it seems like some people are forgetting this...there is a (presumably) 2/3 chance that whatever unit is falling now is ok. Falls from ANY height are treated the same, with the chance of Croaking, becoming Incapacitated with 0 hits, and being totally fine.
Vorteks brings up some interesting ideas, its helpful to seem them laid out all at once I think.
Vorteks wrote:1. The real King Slately was hit by the Archons and is falling. As he fell, the Dittomancer duplicated him and the duplicate is just as valid as the original, preserving the side in the case of the original's death.
Definitely possible, but the Duplicate must require juice to maintain, or perhaps has a time limit just like Uncroaked.
Vorteks wrote:2. Before King Slately was hit and fell, the Dittomancer duplicated him in such a way that the new duplicate BECAME the original, making the previous one the fake. A sort of duplicate-while-switching-places spell. If you've ever seen a Japanese anime where ninjas use "kawarimi", (a popular example would be Naruto, there are others as well), it sometimes works like this.
I believe this may have been the INTENT of the spell, but Lloyd was urging the king to wait, and it seems that Lloyd never FINISHED his spell. So I don't think he succeeded in accomplishing this.
Vorteks wrote:3. The duplication effect actually began before this page when the Dittomancer started casting. This would mean that a duplicate king got hit, and it's the original (who had been hidden from sight somehow) that remains with the flying stack.
Very unlikely if not impossible, because that would require Foolamancy (and thus respark that annoying debate from the discussion of page 78...let's please not go there again....)
Vorteks wrote:4. The duplicate that the Dittomancer created is the one that remains with the flying stack, and it does NOT count as the original. If this is the case, it would mean the side could potentially end when the king hits the ground. But it might not, because as we've seen before, fall damage is unpredictable.
Also possible, considering as I said before it appears Lloyd didn't get the chance to finish his spell.