I just started fielding Daemons as well...though just as allies for the time being. I love the deployment. Don't be afraid to get creative while putting your units down. Getting units in places your opponent isn't used to seeing them right off the bat can be very effective.
Good luck with the Nurgle list! I've stuck mostly to Tzeentch so far, but I'm slowly expanding to the other ones as well.
Doom given form.