Plenty of removal. Peddlers gum up the ground early. Plenty of synergy with your Barter in Blood (Ghoul, Fiend, Executioner, Twins). You should be able to control things long enough until your Demonlord, Wurm or Spear arrive to close things out.
White has a nice curve but doesn't seem overly powerful.
Red is powerful, but has little depth. You could (maybe even should) splash for Bonfire, Wrath, Conscripts.
Blue is decent, but I don't know that it works out better than the above.
You've certainly got lots of options with that pool
1
1 Deathwind
1 Grave Exchange
1 Maalfeld Twins
1 Demonlord of Ashmouth
2 Barter in Blood
1 Undead Executioner
1 Soulcage Fiend
1 Searchlight Geist
1 Butcher Ghoul
1 Human Frailty
1 Pathbreaker Wurm
1 Geist Trappers
1 Nettle Swine
1 Druid's Familiar
1 Gloomwidow
1 Eaten by Spiders
1 Timberland Guide
3 Nightshade Peddlers
1 Snare the Skies
1 Moonsilver Spear
Plenty of removal. Peddlers gum up the ground early. Plenty of synergy with your Barter in Blood (Ghoul, Fiend, Executioner, Twins). You should be able to control things long enough until your Demonlord, Wurm or Spear arrive to close things out.
White has a nice curve but doesn't seem overly powerful.
Red is powerful, but has little depth. You could (maybe even should) splash for Bonfire, Wrath, Conscripts.
Blue is decent, but I don't know that it works out better than the above.
You've certainly got lots of options with that pool