DBH is designed to prevent your opponent playing cards, but neurotoxin is more effective when your opponent is able to play cards.
I think deathstalkers would be more effective.
While neurotoxin kills faster when the opponent can play cards if the opponent isn't playing cards it means they aren't hurting you meaning you have more time for the poison to kill so it's more of a trade off of sorts. Deathstalkers sounds like a good idea to try. The reduced cost will help a lot in the super nova based decks.
Here's some version I tried and how they compared to the same-ish version with dune scorpions.
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Compared to
They seem the same to me. The DBH in these decks is slower and less reliable than DBH in a normal DBH deck so there's enough neurotoxin against AI3 to compare with the poison from deathstalkers.
That's all I'm trying for now for deathstalkers. I'm guessing the scorpions will have similar effects.
As well as this, Death has more poison options. I like this idea though
I'll also try a deadly poison based deck.
Deadly poison made room for sundials so I turned the deck into a poisonstall that I'll probably post if I don't find it somewhere else.
EDIT: I finally tried out some of these ideas.