Removal dragon priest

I made this deck some days ago and I like it very much. It’s still not good against aggro decks. There are only two removal Duskbreakers against them. Ragnaros the Firelord or Obsidian Statue is a good combo with Mirage Callers. The main problem with them, they aren’t playable in one turn together. I have to find another max 7 cost card for copying. I’m going to replace one Mirage Caller with a Faceless Manipulator but I have to earn dust to craft it. I’m looking forward to your opinion how could be the deck better.