A quick thought on evocation
Evocation is the summoning of a spirit outside one’s sense of self. In the Western Mystery Tradition, that’s usually outside of a magical circle into a triangle, crystal, or small table called an “almadel.” In Tibetan magic, it’s into a magical circle called a kylchor. But either way you cut it, it’s a spirit you summon.
For some reason, there’s a lot of emphasis on seeing the spirit visually, that I’ve never understood. Most spirits are pretty naturally invisible, and while one can see them in the Imagination, forcing them to become visible is a strain. I’ve discovered that, visible or not, spirits will give some sign of their presence, subjective or, sometimes, objective. I think the whole “visible evocation” thing is rather over-rated.
Similarly, I think we could conceptualize the whole process differently. I have several friends who live closer to Chicago (or “Civilization”) than I do; when we meet, sometimes they come here, sometimes I go there, sometimes we meet halfway. Instead of making the spirits always come to us, why not meet them halfway? Evocation on the astral is so much easier, even if half the ritual is done in physical space, and trust me — the spirits appreciate the effort.