Thanks for reply and advice!
Based on what you told i have another proposition!
Demon Prince of nurgle with wings, double talons, Suppurating plate, Warlord : Archcontaminator
Chaos lord with chainsword and combibolter
Plague marines x5
- two of them with blight launchers rest knife and boltguns
Two squads od 12 poxwalkers
Foetid Bloat drone with plaguespitters
Plagueburst crawler with spitters.
Idea is pretty much the same, Prince crawler and drone do the dirty work up front, poxwalkers and marines grabbing objective with lord to rerolls 1