RB Vampire Madness

After playing in the eldritch moon prerelease and getting a bunch of new madness cards, I find myself with a pretty good starting point for a red/black vampire madness deck in standard. While I have a few modern decks already, this will be my first standard one, and even with the restricted set of cards, there still seem to be a wealth of options for this relatively narrow theme. I've managed to cut the deck down to about 46 non-land cards, but will need to shave that down to about 37 and I'm starting to have trouble deciding what cards are most worth cutting.

Here's the list so far: https://deckbox.org/sets/1462005

It has a pretty low curve, effectively capping out at 4 cmc, with all of the 5-drops being castable for 3 via madness. The deck obviously wants to be pretty aggressive, but I still am uncertain when making choices between cards like Incorrigible Youths and Twins of Maurer Estate. The aggressiveness of the deck makes me want to cut Twins of Maurer Estate, but Incorrigible Youths seems so fragile - in one of my matches in the prerelease, my opponent had two 3/1 creatures up, causing my Incorrigible Youths to sit by uselessly, not being able to attack. In any case, even if I do cut the twins, I still need to cut 7 more. Would I be better off cutting two or three cards wholesale or 1-2 of 4-6 different cards? What are the least useful cards in this list?