This used to be a problem for old Doran decks. But Assault Formation. Between 4 Assault Formation + 4 Treefolk Harbinger + 3 Doran, that's 11 Dorans. And the enchantment is harder to kill. You could even run 4 Living Wish too (with a 4th in the SB) or Eladamri's Call, but Assault Formation should be good enough.