The problem that there is not so so many synergy around. 3 squads of blightkings with lord of blight and no blightcyst? You don't have good casters, so with good denial you unlikely can cast anything. 20 plaguebearers are not enough, kill 1 and the buff is going down. And just 3 plague drones will do exactly nothing, better take blightcyst.
Here is my list I am going to use on our local tournament
Archaon (General, Plague squall)
GUO (bilesword and massive blade, Tome of Thousand Poxes)
30xPlaguebearers
30xPlaguebearers
5xChaos Warriors (mark of Nurgle)
Allies
Lord of Khorne on Juggernaut
Endless spell - Chromatic Cogs
1940/2000, 114 wounds
Thing here is that Archaon now can kill on two 4+ any hero or monster. With 5 attacks and after charge it will be very likely. Chaos warriors are for some home scoring and we have additional command point