@Square_two: I've answered at your message without seeing your reply.
Now, i've just discussed the presence of stp, so:
@D&T: a version with also Vryn is obv worse for us, and this is another MU where i think that more ramp can give us way more speed than a spot removal. For example, i'm playing a single DRS or a Dryad, both good especially in a list with so many gsz.
As said by you, i'm really loving Souls too, and i can imagine to add the third one.