Tron is a slow, grindy ramp deck with almost no early pressure, so Peach Garden Oath's life gain off your wide, cheap creature base helps you comfortably outlast their card-advantage engines like Visionary's Dance and Mystical Teachings while you beat down. Clowning Around is a reasonable source of go-wide pressure too, but trimming two copies for extra life gain smooths out draws where Tron sits behind Moment's Peace or Giant's Boulder removal; keep the other two copies since board presence still matters for racing. Dust to Dust and Relic of Progenitus have very few targets here (their only artifacts are mana rocks like Prophetic Prism and Bonder's Ornament, not worth dedicating narrow slots to) and Mana Tithe is weak since Tron rarely plays into a one-mana tax while tapped out on a key turn. Keep applying pressure with your efficient creatures and Dispatch before they assemble their bomb-casting mana.