I decided to skip that violinist on all my accounts. 400 gems just wasn't worth it to me. I'm also pretty new - been playing regularly for about 2 months now. I lucked out and got a Glimmereg Alicorn for 125 gems around Easter. It usually drops 4 or 5 energy once a day, with occasional larger drops. If you can hold out for a sale, I say wait for one to get something like that next time.