Naya Delirium goes wide with cheap creatures like Patchwork Beastie, Keen-Eyed Curator, and Wildfire Wickerfolk, so Ill-Timed Explosion is a strong sweeper option that can two-for-one their board once you have extra cards to discard. Colorstorm Stallion is a fast, ward-protected clock that survives their removal-light maindeck and races well against their creature-heavy plan. Spell Pierce is less impactful since their curve is cheap and they can often play around the tax, and a single copy of Vibrant Outburst is enough removal since most of their threats are small. Keep the core cantrip suite, since out-drawing their go-wide plan while applying pressure is the primary path to winning.