Thoughts
I've been thinking for a while that a Lindsey Stirling + AJR collab would be amazing but I didn't know there's a mashup on AJR's Soundcloud.
=> https://soundcloud.com/ajrbrothers/ajr-lindsey-stirling-im-readytake-flight-mashup "I'm Ready/Take Flight Mashup"
Lindsey Stirling and Ryan are both iconic editors so having both of them on a song is overkill. And indeed, this sounds like Ryan just remixed Sterling into I'm Ready, with the violin as background. But it's still incredible, like ah!, Ryan with the up-tempo violin is great.
Edit (:17): I should make explicit that I'm working under the assumption that it was edited by Ryan based on the fact that it shows up on AJR's official Soundcloud.