So I've recently been working on my daemon army and took it to a tournament. Went 2 wins, a loss and a draw. The list I went with was:
HQ
Great unclean one -2*greater reward,level 2 Psyker
Elites
4 beasts of Nurgle
Troops
3*10 plague bearers
1*10 plague bearers with plague ridden
Heavy support
Daemon prince - 2 greater rewards, level 2 psyker, warp forged armour, daemonic flight
Soul grinder with phlegm bombardment. mark of Nurgle
Soul grinder with phlegm bombardment, mark of Nurgle
Total Points: 1498pts
The list was ok. I tried to make it balanced and I think that's what I achieved. It lacks some offensive punch, but makes up for that with resiliency.
Pictures of the guys