Looking for feedback on my new MTG Arena Deck

{"ops":[{"insert":"4 Skyknight Vanguard (M20) 218\n10 Mountain (ELD) 265\n4 Boros Guildgate (GRN) 243\n2 Chandra, Acolyte of Flame (M20) 126\n2 Krenko, Tin Street Kingpin (WAR) 137\n8 Plains (XLN) 260\n4 Shock (M20) 160\n4 Scorch Spitter (M20) 159\n4 Cavalcade of Calamity (RNA) 95\n4 Healer's Hawk (GRN) 14\n4 Lava Coil (GRN) 108\n4 Chandra's Spitfire (M20) 132\n1 Raise the Alarm (M20) 34\n1 Sacred Foundry (GRN) 254\n2 Justice Strike (GRN) 182\n2 Response // Resurgence (GRN) 229\n\nSo far it has been competitive currently ranking in the gold tier 4 but often slips back into the silver Tier. I am looking to move up the ranking so any suggestions or critiques are welcome\n\n\n"}]}