Finally was able to get some official testing done rather than just some pick-up games. Went 3-1 overall.
Round 1 vs Junk
Game 1 was a grindy affair. We both used discard to rip each other's hands apart, I killed his creatures with bolts and he Path to Exiled my Bloodghasts. After killing both his Liliana of the Veils and trading our manlands for each other, I kill him with Demigod of Revenge through his Lingering Souls
Sideboard: +2 Go for the Throat -1 Darkblast -1 Tibalt, the Fiend-Blooded
Game 2 was a total bust. Removal, Tarmogoyf, and multiple Siege Rhinos is hard to beat.
Game 3 played out similarly to game 1. Lots of back and forth, lots of beatdown. Finally I trade my three Bloodghasts for his three Lingering Souls. He passes at 19 life. I play a land to get back Bloodghasts and cast a Demigod of Revenge, getting the other two in my grave. Swing for 21.
Round 2 vs B/W Tokens
Game 1 took forever. He played token producers, I killed them with Gurmag Angler. Rinse and repeat until I got rid of his drawsteps with back to back Kolaghan's Command and killing him.
Sideboard: +1 Anger of the Gods +1 Darkblast +2 Duress +1 Engineered Explosives +2 Pyroclasm -2 Fiery Temper -2 Young Pyromancer -3 Tibalt, the Fiend-Blooded
Game 2 and Game 3 he goes Burrenton Forge-Tender into Rest in Peace, then tokens into Sorin, Solemn Visitor. I get the RIP off the table game 3, but die to a double Intangible Virtue the next turn.
B/W Tokens seems like a really terrible match-up. I may need to dedicate a bit more hate for it. A good way to kill enchantments would likely be best. Maybe a second Engineered Explosives over a Pyroclasm
Round 3 vs Grishoalbrand
Game 1 was an easy affair. Turn 1 I Faithless Looting a Bloodghast away. He goes draw, discard Griselbrand. I then landfall and Inquisition of Kozilek away his Goryo's Vengeance. Bloodghast and Young Pyromancer beats kill him quickly. Discard kept him off his combo all game.
Sideboard: +2 Duress +2 Rakdos Charm -1 Darkblast -3 Tibalt, the Fiend-Blooded
Game 2 was basically the same gameplan. Turn 1 Faithless Looting two Bloodghasts. Discard spells and Gurmag Angler kill him quickly.
Round 4 vs Grixis Control
This is honestly our best matchup, hands down. Grixis will almost guaranteed lose game 1, and unless they run Leyline of the Void or Surgical Extraction with Snapcaster Mage, they will never be able to beat Bloodghast and Demigod of Revenge. My opponent played neither.
Game 1 was quick. He gets turn 1 and turn 2 Ancestral Vision. I beatdown with Young Pyromancer and Bloodghasts. He dies to them and my Lavaclaw Reaches before the second Visions resolves.
Sideboard: -1 Darkblast -1 Terminate +2 Go for the Throat
Game 2 was a bit fairer. We sling discard and attack each other. He gets Ashiok, Nightmare Weaver on turn 3 and begins ticking up. Meanwhile, I fight through his Pia and Kia Nalaar with Lightning Bolt and Bloodghast. He kills my Gurmag Angler and Bloodghasts, and uses Ashiok to play one of my Young Pyromancers. Meanwhile, I'm burning him out with Fiery Temper, Kolaghan's Command, and Lightning Bolts. Cast a Demigod of Revenge for GG flying over his Batterskull
Overall, I'm pretty satisfied with how the deck performed. I've slowly began to realize that although Tibalt, the Fiend-Blooded can be super awesome, he can also be a liability. I side him out in about half of all my games. It might be correct to cut him for two Sin Prodder and another Terminate.
As for my sideboard, I'm probably going to cut the Despise for a Ratchet Bomb. Having more answers to Rest in Peace and Burrenton Forge-Tender would be good, and in general enchantments can be a nuisance. This card also gives me more mileage against token strategies. If it works well enough, I may cut a second Pyroclasm for another.