Here is my 2000 point Nurgle Daemon list:

Mamon - 185
Epidemus - 110
Herald of Nurgle - 95 (cloud of flies, aura of decay, unholy might and palanquin)

Plaguebearers of Nurgle (13) - 225 (chaos icon and instrument of chaos)
Plaguebearers of Nurgle (14) - 240 (chaos icon and instrument of chaos)
Plaguebearers of Nurgle (14) - 240 (chaos icon and instrument of chaos)


Daemon Prince - 265 (mark of Nurgle, daemonic flight, iron hide, unholy might, cloud of flies, noxious touch
and boon of mutation)

Blight Drone - 125
Blight Drone - 125

Decimator Daemon Engine - 185 (storm laser, dedicated to nurgle)

Epidemus is in the unit of 13 plaguebearers and the herald is in one of the unit of 14 plaguebearers.