Mardu Energy is a fast, go-wide aggro deck that combines token producers like Ocelot Pride and Guide of Souls with Goblin Bombardment as a sacrifice outlet to blank your Solitudes — be aware they can sacrifice creatures in response to evoke triggers to deny you the life gain and card advantage. Wrath of the Skies is the key post-board tool, cleanly sweeping their wide boards including tokens and handling Sephiroth and Ajani before they snowball. Boromir, Warden of the Tower taxes free effects from Ragavan's combat damage triggers and Orcish Bowmasters token creation, and its 2/4 body is difficult for them to profitably attack through. Path to Exile gives you a clean answer to a resolved Ragavan, which threatens to bury you in card advantage if left unchecked even a turn or two. Post-board they bring in Thoughtseize and Wear // Tear, the latter of which targets Ocelot Pride and Witch Enchanter, so be cautious about over-investing in enchantments; Teferi, Time Raveler protecting your sorcery-speed sweepers from their disruption is a key edge.