wolf brother could be done with some powers like superhuman smell, superhuman hearing, and a feat for talking to wolves, plus a feat for dreamwalker that could also be taken by others to be able to enter the dreamworld

i wouldn't put them in a dresden files game, they would be the only magic in the setting so campaign with dfrpg caster power is moot anyway, i don't think the cost should necessarily be too terribly high.

I would think that you are going to have o have a high concept of either ashaman or sister basically something that says your a channeler, that will in fact be a BIG compulsion aspect really big. sisters are distrusted and must follow some rules as well as bow to any who are more powerful than themselves, and ashamen are feared because they are men who can channel and are regimented as well.

maybe have the difficulty to unravel  a weave, for anyone other than the one who tied it, be affected by how many shifts you get when tying it, so say base diif 2 or 3 to tie the weave, if you get 5 shifts then diff 8 or something like that, or could even double that, and you could tag aspects while tying the weave to make it purposely harder to unravel, then unraveling would not be a one shot trick, but an extended roll taking some time, the way it does in the books

never played pbp how does that work out?