My current favorite: Donna Eden
I've never had Reiki but I've experienced some other energy modalities like LaHoChi and Access Bars that really helped me energetically heal - something I hope you are doing first and foremost since your energy reserves have been sapped, as you say. If you have the physical ability, I'd next/otherwise suggest Qigong and Kundalini Yoga. I began doing them first thing in the morning a number of years ago and within a few months, I was channeling. Another thing I'd do in the morning was engage in ritual - something you're already doing in your Wiccan ceremonies. Incorporate all five senses though, along with gratitudes for the day ahead and/or prayer. This routine helped me to focus for the rest of the day. (Donna Eden's Energy Medicine also has some good tapping techniques for focusing attention too). For you, I'd focus on the dreams - dream journal and lucid dreaming. How was your psychic ability coming in? Which senses were being used mostly? Engage whatever are your main senses in various ways, like crossing senses (eg. sound - what does it remind you of? what color would it be? what feeling does it evoke? if you had to describe it to deaf person, how would you do so- really delve into it in whatever manner you can think of). If you're an energy healer, that sounds like you also need to really work with your physical sense, Someone had suggested this series of Youtube videos that may help: https://www.youtube.com/playlist?list=PLk6FRPS_rNwk98vugKrzhPb085KENM8bY (they're in reverse order). I don't see imagery as well as I feel energy so, I'm currently trying these videos by sensing the energy through my hands (as well as visual). Books to look into: The Psychic Pathway, Unearthing the Sacred, The Path of Energy, and Subtle Energy Techniques.