While the Malaise and Desecration weaknesses could probably be combined, there's nothing wrong with the sheet I don't think. Playing a mute character could pose some challenges, but if there's a definite personality there anyway, it could be doable. And with our discussion of how to reconcile fusion with the desecration system, he should be good to go. I see that Raiden is pretty much level 3, so you could begin straightaway, once we settle on an entry point.