Bone Music is good. This deck has a sneakily large number of sling triggering cards.
I haven't done too much testing with this, but I think there is some serious potential. I'm sharing to see if anyone can perfect it or give suggestions.
Edit - Swapped a few things around after an evening of testing and a few good ideas from ItsTenz.
I made masters with my list that season, but most of the cards in that list were nerfed at some point in ways that significantly impacted how the deck works. If I were to try it again, I would probably try it using your list.