I took the plunge on the Death Guard recently and set up a list using some of my other chaos models already. Please let me know if there is anything major I should tweak, and I might add I play in a relatively casual environment. I would 100% like to use Mortarion in the list but other than that I'm open to suggestions.
5 plague marines, 2 plasma guns, 1 powerfist
5 Plague marines, 1 plasma, 1 BL, 1 powerfist
Helbrute with Lascannons
Blight drone with spitters
Defiler with Scourge
Rhino with havoc launcher