There are a lot of great commons and uncommon to acquire for very little money that will give your deck the boost youve been longing for
Creatures : Copper Myr, Gold Myr, Iron Myr, Alloy Myr, Brass Squire, Darksteel Myr, Myr Welder, Shimmer Myr, Myr Battlesphere, Kuldotha Forgemaster, Ezuris Brigade, Jor Kadeen, the Prevailer, Nullmage Shepherd Johan gives your attacking creatures vigilance of sorts, so having creatures that tap to do stuff is quite handy
Adventurer cards aren't instant or sorcery cards while they're in your graveyard
If Valakut doesn't have a text box, these decks really struggle to win
Phantom Premonition has quite a lot of great general EDH reprints, from Ghostly Prison to Windfall
Theres also some unfortunate anti-synergy between the gameplan of sac your small creatures and the other things red does well this set battles and convoke