I just started watching this last week (Episode 8)when CSI was a repeat. What a fun show- except I'm still not sure what the objective is...is spiritual enlightenment something that can be measured or rewarded? Very strange, really.
Anyway, to answer your question, just based on last week's show, I would choose Art first- I am very comfortable with his type and would love to talk about shamanism with him. Ta'Shai is a close second- I just didn't get the opportunity to see her as much in this last episode. I too have some interest in learning more about voodoo. I have been to a few of their rituals and found it fascinating... I went to one that called in the spirit of insects, and we had the most beautiful/bizarre looking moth I'd ever seen come visit. It was huge! Powerful stuff.
Avocado is cute but way too preachy and earnest. Fiona is a bimbo on a broomstick and Don is a poser (had too many of these in my life already).