I would use over-whelming firepower. Did DG get access to the new Havocs? If so, you could use the chaincannons to mow them down. Something else that works really well are any of the daemon engines. Helbrutes and other vehicles designed for close combat will work really good against them. A squad of Myphitic Blight-Haulers could do some seriously good work into them.
DG terminators could work really well too.
Look for units that are almost immune to small-arms fire when you want to deal with them.
No, we still don't have Havocs unfortunately
I've tried charging them with hellbrutes and even hellforged contemptors, but usually I only kill 2-3 and with their powerfirst and the extra attacks they punch dreads into oblivion, especially the hellbrutes since it doesn't have an invuln. A whole squad of Blight haulers is too unreliable I found, even with the +1 to hit (which I still think I'm paying too much for)
Terminators again are way to swingy, everything but the flail wounds them on 4+ at best, even with an archcontaminator warlord nearby they often survive to hit back.
I will admit that I'm mostly unfamiliar with the new DG codex, but what you need is stuff that does a flat 3 damage, 2 damage in a pinch. Quad Mortar Rapiers are a good example, but unclear whether DG get them or just generic CSM do. But small arms fire they are very durable against. Also, surprised that no Blood Angel player is using them tbh. We have a relic that gives an ancient a 5+++ FNP equivalent bubble, which you can stack with a company ancient for the 4+ chance to shoot again when you die. It makes a very scary brick. Anyway...
More generally, you want things that either ignore their overwatch, or functionally do by being T8, or T5+ with a good save. T4 stuff, even with a half decent save, just get shredded thanks to the # of shots, even on just overwatch.
Any dreadnought variant that makes it into combat with them is likely to turn them to paste, since you'll wound them on 2s thanks to your Str12, they'll only have a 6+ save, and each failed save is a dead guy.
If your trying to weather the fire, make sure your necrotic butt is in cover. They don't like dealing with 2+ saves. In fact, I'm suprised your Plague Marines are dying much to them. T5, 2+ save in cover, and a 5+++ means that they *should* be a nightmare to remove with Str4 no ap fire, even with as much as aggressors put out.
My local BA players likes playing mostly fluffy, he uses the banner most of the times on a unit of Sanguinary Guard, conga-lining back to him as needed.
Even when in cover my Plague Marines tend to get shot to uselessness, and as said before even when my hellbrute makes it in he's either punched to death by survivors or sometimes by some smash character that heroically intervened because the Aggressors were castling around him for re-rolls.
My problem is exactly that I don't feel like like I have any really efficient option to kill 3W models: most of my weapons are either 2 damage or d3 damage.
Edit: The Foul Blightspawn sometimes does work, but again I roll high Str on his flamer as often as not, and my opponents have long learned to keep way from him.
Edited by BlueBiscuit Raider, 04 October 2019 - 02:13 AM.