MTG Salvation

I feel like this deck is pretty good but I have been losing the midgame / card advantage and end up losing. So far I am 1 and 2 with this deck. I have 6 more matches to play.

So, the Blue and Green in this pool are underwhelming so I think you're right to be looking at the W/R/B cards, but I think your current mix is off. I do not like this White splash in this deck. The cards are just not strong enough to justify it. You're trying too hard to make Madness work, but splashing for a Constable isn't worth it, nor is playing a Haunted Cloak to splash Missionaries. If you were going to splash for a White card at all it should be the Angelic Purge. You should be running the Warped Landscape in a three color deck, and you're also running 41 cards which isn't optimal.

The way I see it, these are your best cards in those three colors:

White:

• 1 Thraben Inspector
  
• 1 Moorland Drifter
  
• 1 Dauntless Cathar
  
• 1 Cathar's Companion
  
• 1 Paranoid Parrish-Blade
  
• 1 Apothecary Geist
  
• 1 Avacynian Missionaries
  
• 1 Inspiring Captain
  
• 1 Reaper of Flight Moonsilver
  
• 1 Strength of Arms
  
• 1 Vessel of Ephemera
  
• 1 Angelic Purge
  
• 1 Survive the Night
  
• 1 Tenacity

Red:

• 1 Insolent Neonate
  
• 1 Ember-Eye Wolf
  
• 1 Sanguinary Mage
  
• 1 Bloodmad Vampire
  
• 2 Convicted Killer
  
• 1 Howlpack Wolf
  
• 1 Sin Prodder
  
• 1 Skin Invasion
  
• 1 Tormenting Voice
  
• 1 Uncaged Fury
  
• 1 Malevolent Whispers

Black:

• 1 Indulgent Aristocrat
  
• 1 Asylum Visitor
  
• 1 Heir of Falkenrath
  
• 1 Olivia's Bloodsworn
  
• 1 Rancid Rats
  
• 2 Crow of Dark Tidings
  
• 2 Stromkirk Mentor
  
• 2 Twins of Maurer Estate
  
• 1 Murderous Compulsion
  
• 1 To the Slaughter

Plus you also have:

• 1 Neglected Heirloom
  
• 1 True-Faith Censor
  
• 1 Murderer's Axe

I think your best "Vampire" deck looks something like this:


With the Convicted Killers in there mainly as ways to flip the Heirloom. Not sure this is your best deck though. I think your White is pretty good overall, so maybe a W/R or a W/B deck would be better.