For City Fight
HQ:
Greater Demon w/winds of change
Elite:
7 Chosen Terminators: 1 combi flamer, 1 combi melta, 2 chainfists, Icon, Furious charge, Asp Champ w/strength, mutation, spiky bits, nurgle's rot, lightning claws
7 Possessed Marines: Demonic Flight, icon, Asp Champ w/power fist, strength, mutation, spiky bits, nurgle's rot, teleport homer
Troops:
7 Plauge Bearers x3
7 Plauge Marines Infiltrate, x2 plasma gun, bolters frags, icon, Asp Champ w/, strength spiky bits, power weapon, teleport homer, nurgle's rot, melta bomb
7 Plauge Marines Infiltrate, x2 flamer, frags, icon, Asp Champ w/demon chains, nurgle's rot
7 Plauge Marines Infiltrate, x2 melta, bolters, icon, Asp Champ w/mutation, strength spiky bits, power fist, teleport homer, nurgle's rot
I'll admit that if a scenario doesn't allow for infiltrate this will not be the best list. However, a majority of the time it will happen. Other weakness: little weak on anti armor, but not miserable at it.
Goal: trying to make a foot list viable and I like HTH