Background.
Swarms have been a feature of daemons since the earliest of days when we saw Nurglings for the first time. However, for the other chaos gods, there are few analogues. Indeed, Nurglings were supposed to be the analogue of steeds -- given the tenuous associated with palanquins. These days, Tzeentch competes via screamers (with a stretch of the imagination), and via brimstone horrors perhaps as well. Khorne and Slaanesh doesn't really have anything in this category.
Strengths.
Lots of wounds are the main strength of the daemon swarms. That's about all there is to write home about.
Weaknesses.
They're systematically weaker than other troops across the stat line apart from Leadership and Saving throw. However, for the price, the wounds are probably worth it. They are also support units.
Sadly, they can only take one emanation of horror as well. This makes things a tough choice.
Builds.
Resplendent Terror Build:
10 Swarms, Warp-Scaled Hide (250 points).
I actually like the naked build here. Add in an armour saving throw and they're a real pest.
Possibly take miasma of rot instead to get that negative modifier in play for this army.
Swarms have been a feature of daemons since the earliest of days when we saw Nurglings for the first time. However, for the other chaos gods, there are few analogues. Indeed, Nurglings were supposed to be the analogue of steeds -- given the tenuous associated with palanquins. These days, Tzeentch competes via screamers (with a stretch of the imagination), and via brimstone horrors perhaps as well. Khorne and Slaanesh doesn't really have anything in this category.
Strengths.
Lots of wounds are the main strength of the daemon swarms. That's about all there is to write home about.
Weaknesses.
They're systematically weaker than other troops across the stat line apart from Leadership and Saving throw. However, for the price, the wounds are probably worth it. They are also support units.
Sadly, they can only take one emanation of horror as well. This makes things a tough choice.
Builds.
Resplendent Terror Build:
10 Swarms, Warp-Scaled Hide (250 points).
I actually like the naked build here. Add in an armour saving throw and they're a real pest.
Possibly take miasma of rot instead to get that negative modifier in play for this army.
Crimson Fury Build:
8 Swarms, Brass Collars (200 points).
Same issues as above.
Creeping Scourge Build:
7 Swarms, Miasma of Rot (161 points).
These are Nurglings, but poorly built! Get that negative toughness modifier in play. Equally, Nurgle is not short of this ability.
Lurid Onslaught Build:
6 Swarms, Stupefying Musk (138 points).
No idea what these are in terms of the background.
Maddening Swarms Build:
9 Swarms, Warp Scions (207 points).
These actually work for Tzeentch. Maybe take 10 instead of 9, but regardless, you're competing further in the psychic phase which is good for this build. Perhaps represent with lots of brimstone horrors on one base and you're done.
Mirror of Hate Build:
10 Swarms, Wings (250 points).
Flying swarms. Let's say no more about this in terms of lore. They could easily be represented by small critters with wings. I really like what wings does for them and in game.