Traditional Aristocrats Act 2 core, working to diversify the sideboard for fine tuning consistency.
There are a variety of endgame conditions that The Aristocrats can present. The most vanilla would have to be after bashing their life low enough, simply eat up all my creatures and tokens with an Aristocrat while Blood Artist is present. This combo is improved with Blasphemous Act, which also kills all of their creatures, triggering Blood Artist while the Aristocrats survive.
Once you get enough creatures on the battlefield, this deck has the advantage of many instant speed interactions. Sacrificing Doomed Travelers for sudden 1/1 spirit blockers for unwary opponents. At the same time, activating morbid for your Tragic Slip to swallow up that other large attacker. Because of managing all of these interactions to your greatest advantage, its can take a while to get them all down, but one you're comfortable with the synergy it can overpower many game plans.
In this same vein of gameplay, crunching the numbers can yield solid wins. A Blood Artist and another sac outlet like Cartel Aristocrat or
Falkenrath Aristocrat
turns an army of weaklings into a game winning scenario. After sacrificing to Cartel Aristocrat for an unstoppable 2/2, hopefully swing in for 4 with
Falkenrath Aristocrat
and all the other miscellaneous Lingering Souls. Afterwards, sacrifice the remaining creatures for the last few points of damage via Blood Artist.
The last and most unlikely outcome that can win games out of no where is Boros Reckoner and Blood Artist. With enough creatures on the board, dropping a Blasphemous Act will allow the Blood Artist to drain enough life to put them in range of the Boros Reckoner's 13 redirected damage.
Sideboard:
Boarded in two Blood Baron of Vizkopa for matches with heavy removal like Jund.
Obzedat, Ghost Council, Assemble the Legion, and Underworld Connections are all suited for a slower pace game, as they flex full value over a much longer period of time.