Orzhov Midrange has a dense removal suite (Fatal Push, Get Lost, Vanishing Verse) plus resilient threats like The Queen of Dale and The Wandering Emperor, so you need to both out-threat and out-remove them: Scorching Shot and Redcap Melee give you reliable answers to creatures like The Queen of Dale, Skyclave Apparition, or a Wandering Emperor-made Samurai token, since Burst Lightning's unkicked 2 damage often falls short. Redcap Melee can also hit planeswalkers like The Wandering Emperor or Elspeth, but every permanent they control is nonred, so it will cost you a land each time; use it when the tempo is worth it. Neither card can touch The Ooze, since it is an artifact rather than a creature. Boomerang Basics is weak since it doesn't beat their card advantage engines like Caretaker's Talent or Obsessive Pursuit, just delays them a turn. Play around Thoughtseize taking your best spell on turn one or two, and be mindful that Vanishing Verse exiles any monocolored permanent you control, so diversify your threats across turns rather than overcommitting to one attacker. Close the game quickly before their removal and card advantage pieces take over the late game.