Almost a total overhaul of the deck, missing many of the cards I first started with but now containing cards better suited for the aggro I was going for.
Bant Sureblade is my first attacker, getting him up to 3/2 with first strike is a great way to handle smaller speedy attackers from the opponent's side of the field. Provided they don't swing with a 4/4 first or second turn D:
Dromoka's Command and Valorous Stance is great for multiple scenarios, either destroying aformention 4/4 or stronger, or protecting my creatures from being destroyed. Also a great way to remove smaller creatures that may prove troublesome later. Swords to Plowshares or Path to Exile are possible contenders for later additions or the sideboard, but they aid the opponent and I don't wanna do that.
Fleecemane Lion and Oversoul of Dusk are my champions, coming in to deal some massive damage. Both are powerful attackers late-game and Oversoul can't even be touched by other colors, so he's a short drop and a sudden stop for anything colors besides green and white that face this deck. Both Lion and Oversoul can be bolstered by Wilt-Leaf Liege to make them stronger.
Finally, I replaced Beastmaster Ascension with Behemoth Sledge because it was faster and more direct, giving also lifelink and trample. Obviously it doesn't give me the same +5/+5 but it forces me to attack, leaving myself open to counterattacks and counterspells.
Grove of the Guardian and Stirring Wildwood are great late game as well, giving me emergency creatures to help finish off the opponent or, for Grove of the Guardian, a towering 8/8 I can beef as high as 10/10 to halt most other beefy creatures. Other helpful cards include Beastcaller Savant and Renegade Rallier to bring key cards like Fleecemane Lion back from the dead, and act as a 4/4 once Wilt-leaf hits the field. Last but not least, Shield of the Oversoul gives as much as +2/+2, flying and indestructible to a single multi-colored creature I control making a powerful attacker.
What I need now are some planeswalkers, like Elspeth and Ajani. I'm also toying with the idea of adding Gaea's Revenge though it has a particularly high CMC, it shouldn't be a problem with Beastcaller Savant rolling around in my deck. I'm also toying with the idea of removing Beastcaller as my landbase is already at 24, plenty enough for an aggro without mana-producing creatures to boot.