Re: OOC 1
A second high stat is a higher base cost (a more impressive miracle), so it'd be base cost 7. Duration is a Cost Factor, and will be offset by using a harmonious inclination.
I really don't recommend spending the bank on gathering a team of ghosts. You'll be spending most of your belief, you won't be getting any immediate Belief from the awe of spectators, you won't be creating the slow trickle of belief that comes in from having faithful believers.
The core conceit of the game is that the player's God characters are only as strong as their believers. I started the PCs off essentially naked and hungry and with a paltry starting pool of belief,
It's a bit like going to a Brazilian steakhouse and ordering a salad.
Unless you have ideas about how you're going to gather followers using this team of ghosts using your remaining belief, I'm having a hard time seeing how you'd get any.