This deck looks really cool! Krenko is the strongest mono Red general in my opinion, and playing him on a Budget is not much different than playing him without limitation.

You could probably add Ib Halfheart, Goblin Tactician and Zo-Zu the Punisher. Both are not very expensive but very strong! Reckless Bushwhacker would also fit in perfectly.

Hey, thanks for helping out. Indeed, all three cards could find a place in the deck. I am currently evaluating, which cards are exchangable and which I definitely want to try out.

Spikeshot Elder, Marton Stromgald

I would consider Ghirapur Orrery. While it looks symetrical, you are much more likely than other decks to have an empty hand and thus get the draw 3 and as a red aggro deck? You can never have too much gas.