OK, here's an interesting question with a dubious thought at it's heart.
Which comes first, "after both sides have deployed at the start of the game", or "just before the player that goes first should begin his first turn"?
Here's the reasoning, a list running Vect and Malys, precognisant before or after the Sieze initiative roll? Obviously redeploying after is a big advantage.
I figure this may have already come up with Eldrad, but I didn't see anything in the eldar or main book FAQs.