Dimir Terror mirrors your own Tolarian Terror plan, while Snuff Out and Agony Warp are their only removal for your own threats. While Sneaky Snacker is a 2/1 with 1 toughness that dies to Gut Shot, their other creatures have 5 toughness (Gurmag Angler 5/5), so Gut Shot isn't a clean upgrade here and stays in the board; Blue Elemental Blast and Hydroblast also stay in the board since Abandon Attachments is their only red spell. Keep your mainboard intact with Deem Inferior and the full counter suite to fight over Counterspell wars.