As said. Start the blight accumulation on a model, draw it closer, 1AP charge it with a Rat King (two successful hits that's 3 points of blight almost immediately, 4 at the end of turn). Without really trying I've stacked about 8 blight on Seamus, after he cleared the previous lot of blight with Chiaki.
Leveticus, desolate soul, from ash, 7 cache
Rusty Alyce, desolate soul, from aether
Desolation Engine
Ashes and Dust
2 Hollow Waifs
Every model is capable of summoning abominations (except the Waifs). On the first turn drop a scrap marker with Alyce and turn it into an abomination with Leveticus for the extra activation. Rusty (on her gun) Desolation, and Ashes and Dust, have minimum 3 damage that can, on a trigger, turn a killed model into an abomination. Abominations too can (if you get really lucky) turn a killed model into an abomination. Rats have 3 wounds. I had Ashes drawn into combat with Hamelin by Baby Kade, Ashes made three attacks against two rats and a Stolen that were surrounding Hamelin. I flipped one and cheated two, and ended up surrounding Hamelin with three abominations. That swing, combined with the lack of (0) and suits for Hamelin for the two turns until he managed to kill the abominations meant I was out-activating him for the rest of the game.