Xavier will side with Dak and Rianna because well why not. His darkside is crazy and violent.
So Xavier what are you going to do I say we kill them all ask questions later.
"That would only serve as a minor satisfaction."
Xavier walks up to Rand and Gallador.
"This isn't worth it you two. Gallador you can have Gorag and another one that would give you two servants under your name surely that is worth one Torvus. Or we kill them all. Although they would still all be a part of Galder's group."
"Either way we don't think you want to push this issue. We don't think you'd like the odds or the realization at who holds the real power here and its not you and you would die today." Xavier says very calmly knowing full well what he says is true.