Is the telepath mindhandling your neurological pathways? I would think that would fall under Biokinesis. And yes, I do think the psion needs a certain amount of knowledge to perform certain things, for instance making a cut cloth is easy, but performing psichosurgery does need some anatomic knowledge.
If telepath cannot handle neurological pathways of other person - how on earth can he read thoughts? And even more - send own thought to given person as form of communication. There is no esoteric thought dimension - if you scowl at quantum teleportation - well then I'm sorry thoughts are at least on science level just in our neuron cells. Same with empathy, emotional manipulation, perception manipulation. It's all BRAIN. Do with it what you want?
Maybe I haven't mentioned it but I don't want magic with a very thin coat of paint. It has to feel/function different or I'm not using it.
That's bad considering whole pulp psionic shtick came from certain less spiritualistic aspects of XIX-XX century esoteric interest. Sure you can easily differentiate it from real high magic let's call it - hermeticism and other. Ritualistic spiritual stuff. But magic as psychic powers that's specifically pulp magic. And D&D magic... is I dunno even, it's try to be more like medieval magic, but demands of system make it more like superpower Mandrake Magician.
I'd say whole pulp thing is - you have superpowers. Depends how you paint the setting you can show them as results of psionic powers/arcane magic/gamma ray mutation - but ultimately they lack real root neither in religion nor magic nor science. Religion/magic/science are just thin paint... if you dig deep enough - there is no much difference on pulpish level between Professor X, some pulp era telepath, powerful enchanter wizard or saint with powers to see through people's bullshit.
So either invent really good pseudo-physics to justify and limit your specific psionic powers, or just you know accept it's just elf-bullshit painted with sci-fi chrome paint, and organise powers from gaming perspective, and just give them proper flavour in language and lots of handwavium.