You guys are IMO massively overrating Sisto. From what little I've seen from Malcom, he's easily the better player of the two, so there's just about zero chance he would find a place here. Again, as I've said before, Sisto first of all really needs to add some consistency to his game, and even if he does, I doubt his shelve is much higher than the likes of Celta.
Really fun player to watch when he's on his game, though.