Alright so nurgle got 5 main game kits, + a couple darkwater kits, ignoring the DW characters let's say that's 8 new kits (including 2 refreshes):
-pestigors
-sloven knights
-rotswords
-blight kings refresh
-festus refresh
-poxwretches
-cankerborn
-blight templars
How would (you) go about a similar second wave for tzeentch?