I'm saying in general.
Classic Vampire Mono Darkness 6xvampires, 6xpests, 3 steal, 3drains, dagger + shield has thousands of games tested at >90% WR against bronze and was part of the 1.32 studies was showing 93% WR it had >99% in 1.30
In 1.30 The epinephrine version has also shown >95% WR against bronze
Even years and years ago The Vader Saders version was competitive in the T50 Grind (Arena replaced T50)
But in general any solid completely upped vampire deck does very well against unupped cards. It's big weakness is Antimatter, Short of those in a bow or
mono or duo, you'll out last your opponent. The stats only started to slip a bit for them in 1.32 because of SoW, darkness used to make mince meat out of aether until that card came along.
EDIT:
I'll add I just did a 25 game test with this.
Weaknesses are for the most part expected, mono
, and antimatter, however this also struggled against unupped classic vampired mono darkness, two decks, of this type it lost against, once from deck out, once from kill at turn 20, because it lost against the steal wars by not having enough steals to counter back, and the pests slowed it down too much. Stick with the classic 21 Wins, 18 EMS, 4 Losses, 84% WR
A little suprised unupped mono darkness gave it some problems.