Okay I made a version that just changed a few cards from what you were running.
https://deckbox.org/sets/816108
What I like about is you can cast Rescue from the Underworld on your opponents turn using Sylvan Caryatid or Elvish Mystic as one of the mana to cast it and also as the sacrifice.
I tweaked your land some as well, I would consider using some Mana Confluence So you have some additional access to white mana if you make it to late game and need to hard cast Ashen Rider
I think it's a very interesting deck, and could be really fun to play.