I have found a different approach to make use of Soulcatchers' Aerie, you can find it at my deck lists.
But perhaps Battle Screech might help you as well? Judge's Familiar as 1cmc and Stormscape Familiar for 2 (reducing white spells by 1 mana).
Yet I miss some creature removal, didn't want to play it either, but Wrath of God or something similar sounds like a possible option.