I'm planning to app Serah to melodiesoflife and I'd love to have Hope there along with her! It's a new Final Fantasy based game with a focus on adventure and exploration. Since the game hasn't opened yet, I can't say how backtag-friendly it'll be, but I doubt slowness will be a problem. I'm quite slow myself, and can't boomerang to save my life, so I can at least guarantee one castmate that will backtag you into oblivion.