I'm not convinced that Nailbombs don't like darker guitars.
I have an A-Bomb in my every dark and bassy Explorer and it works a treat, much better than a Warpig. People also warned me off a Miracle Man for it as they thought the combination might be too dark.
What A-Bombs don't suit are overly middy guitars, like SGs.
I think they can suit either bright or dark guitars as long as the mid-mids aren't too prominent in the acoustic tone of the guitar. I guess they sound different in a dark guitar compared to a bright guitar, but in the case of my Explorer they still sound good.
The A-Bomb is a late '80s early '90s sound, but a quite specific one: the aggressive middy sound of Sepultura, Possessed, Ratos de Porao, and, surprise surprise, Nailbomb. It's predominant tone is the hardcore/metal crossover sound of the late '80s, which became the '90s metal sound