2000 Points v Nurgle

I am playing a 2000pt Maelstrom game v Nurgle/Death Guard on Wednesday.  I will be fielding Reavers for the first time and wanted some list critiquing and suggestions on how to utilize the Reavers.

CAD

HQ - Succubus with Armor of Misery, HWG, and an Agonizer (120)

ELITES - 1 unit of 3 Mandrakes (36)

TROOPS - 5 Dual Cannon Venoms with 5 Kabalites and 1 Blaster (600)

FAST ATTACK - 3 units of 6 Reavers with 2 Caltrops and 2 Heatlances in each unit (438)

HEAVY SUPPORT - 2 Triple Dark Lance Ravegers with Night Shields (280)


COVENS FORMATIONS

GROTESQURIE (520)

Haemonculus - Sump, Vexator Mask, Scissor-hands

2 units of 3 Grotesques with a squad leader equipped with an Agonizer and in a Raider with Night Shields