Gro-A-Tog relies on countermagic like Counterspell and Circular Logic plus removal like Smother to control the board while building toward a lethal Psychatog, so a fast, low-to-the-ground creature clock backed by Swords to Plowshares is your best plan. Crimson Acolyte doesn't have direct synergy against their mostly blue/black shell, but it's still a cheap, resilient body that can grant protection from red to blank a stray Grim Lavamancer-style effect from a splash; treat it as a marginal upgrade over Cursed Scroll, which is too slow and easily disrupted by their Duress. Keep your full removal and aggressive creature package, since Wild Mongrel and Basking Rootwalla dodge Smother's mana value restriction less than bigger threats and can pressure them before Psychatog gets online. Discard outlets like Wild Mongrel also help you fight through their own discard-based Psychatog pump in combat math if it comes to blocks.