Well, 6am would be nice.
Were up to terrain and deployment.
The Imps have a google doc with a screen grab that shows how they envisage deployment - so something like that for both sides. Or even a vassal log file that has ships in place and at speed. Let’s says Imps bottom of screen, Rebels top.
deployment will be simultaneous.
I will plonk the terrain pretty randomly unless there are strong objections.