Just making sure I'm reading this right. From Codex Witch Hunters:
In missions where there is a choice of table edge, the Inquisitor must take a Leadership test before the game and if this is passed he may choose the deployment zone for his army rather than rolling a dice for it.
So if you combine this with a 5th Edition mission, then you could conceivably roll a LD10 test to take deployment zone and first turn instead of a straight
d6 roll off?