Passing up on Slaanesh was hard - the sexier theme, better paths arguably, much cooler looking units... these purple Indori-looking guys are fire.
Most appealing was their 100 gold communion slaves with heavy armor+.. awe and good stats, with paths that give them either a communion slave utility or self casting quickening and with a good bless you have a viable thug - and you can build 2 per turn per castle... awesome.
Whereas Nurgle is a bit meatier and starts off slow - I ended up actually changing my strategy a little bit, still went for the statue of war build because those freespawns barbarians = death gem generator, setting up a loop where I get 1 death gem per SLT mage in a province with a bane venom charm and some barbarians, or use milking the barbarians in combat by leaving them at the back with a Nurgletaur or Plaguebearers... will be able to use shadow blast very liberally
However, once I get a bane venom charm, find a wasteland somewhere...
I will build a death geem fucktory worrrrrrtheeeee of Lord Norrgle
Then I can use this death gem factory to build heralds of nurgle, for 15 death gems, which produce 1 plaguebearer per turn.
In comparison, the ITEM, not unit.. that auto-summons a tough unit, infernal contract... costs 90 fucking blood slaves and 5 fire gems ... BUT 90 FUCKING BLOOD SLAVES.
I've still gone down this route in other games, but massing vampires is arguably better and cheaper.. usually in those very very long games, it ends when people start fucking around with level 9 spells anyway, wishing for Armageddon, Utterdark or a heavily overcast burden of time.
- but Nurgle... nurgle can do this for only 15 gems it has a mechanic to produce.
Sure plague bearers aren't as good as devils at killing shit, out of the box - but they are all decked with annoying anti-SC specials and of course I took 3 greater blesses so they will have other tricks