Personally, when it comes to the antagonist's schemes, it's not particularly amazing. The MC acknowledges that she is a villainess at heart, but what sets her higher than the usual villainess is her diligence in studying politics and the like. Her chemistry with the ML is one of my personal favourites, as unlike with a lot of reincarnation scheming stories, it happens unintentionally, at a natural pacing.
The Villainess Reverses the Hourglass