Hi there, I got this deck here which is in my opinion is pretty solid but I need your opinion on how to make it much better and efficient.

Lands

10 mountains
9 swamps
4 sulfurous springs

Creatures

4 Onna's prowlers
4 Reckless wurm
4 Tarox Bladewing
3 Shriekmaw
3 Taurean mauler

Artifacts

3 mindstones

Sorcery

2 diabolic tutor
3 profane command
3 incendiary command

Instants

3 incinerate
3 shocks

Planeswalker

2 Chandra Nalaar

Cant afford the damnations yet but will replace the three incendiary commands with it soon. Its runs well on a good draw, a reckless wurm on the third turn courtesy of madness via the onna's prowler usually certifies a win on the 6th turn. But I got some issues with it running out of gas on the mid game when the 3rd turn wurm combo doesnt happen. Any suggestions? Thanks

I really hate to be the bearer of bad news, but I don’t think your madness combo will be able to win consistently. Even if you can pull it off, other decks can drop Doran on turn two or Earwig Squad on turn three. I am going to recommend taking this deck in a new direction, focusing on good fliers and Molten Disaster. This new setup will allow you to sweep the board from time to time while sparing yours (except for Shriekmaw, of course). All of that removal will give Elves and Kithkin a tough time. Void for five can absolutely slaughter Reveillark combo (Reveillark, Body Double, Riftwing Cloudskate, and Mulldrifter all cost five). Also, your mana base could definitely use some tweaking, as there are still a lot of great B/R lands that you haven’t added.

Hellfire.dec v1.1
20/16/24
4 Oona’s Prowler
4 Hypnotic Specter
4 Shriekmaw
4 Tarox Bladewing
4 Demigod of Revenge (Until this gets released, Taurean Mauler or Reckless Wurm can take its spot)

4 Nameless Inversion
4 Incinerate
2 Profane Command
4 Molten Disaster
2 Void

4 Sulfurous Springs
4 Graven Cairns
4 Auntie’s Hovel
4 Molten Slagheap
1 Urborg, Tomb of Yawgmoth
3 Swamp
4 Mountain

Sideboard:
4 Pithing Needle
4 Extirpate
4 Damnation
3 Deathmark