1750 Points Nurgle "Plonk" Army

This is just an idea I had for a list. I'm trying to make it Mono Nurgle, though if anyone has a great non- Nurgle idea I'd be happy to hear it.

HQ-
Herald of Nurgle, Lesser Reward, Greater Locus of Fecundity- 80
Herald of Nurgle, Lesser Reward, Greater Locus of Fecundity- 80
Herald of Nurgle, Lesser Reward- 55
Great Unclean One, Mastery Level 3, 2 Greater Rewards- 290

TROOPS-
15 Plaguebearers, Plagueridden, Instrument, Icon- 160
15 Plaguebearers, Plagueridden, Instrument, Icon- 160
15 Plaguebearers, Plagueridden, Instrument- 150

FAST ATTACK-
3 Plague Drones, Icon of Chaos, Plagueridden (Lesser Reward)- 156
3 Plague Drones, Icon of Chaos, Plagueridden (Lesser Reward)- 156

HEAVY SUPPORT-
Soul Grinder, Daemon of Nurgle, Phlegm Bombardment- 180
Soul Grinder, Daemon of Nurgle, Phlegm Bombardment- 180

TOTAL- 1741 Points

The basic premise is that the two Drones advance to cover, allowing the Plaguebearers and GUO to precision deepstrike in cover or on an objective. Meanwhile, the 2 Grinder cover hop across the board, spraying pie plates around. The Plaguebearers just sit on the objectives, the plagueridden accepting challenges while the herald chews up any serious threats in combat (Takes Etherblades). The GUO bounces around, being a pain, while the drones switch to kill mode. The Soul Grinders continue to advance, butchering units.
So yeah, that's my list. I'd love any feedback, as I'm considering using this for a competition. I'm not sure what to spend that final nine points on, and once again would love any suggestions. Hope you all enjoy!