I think that hebrew letters are best for visualization, there are a lot of studies in this area of kabbalah, this have a lot of power in time-space:
Quote:74.15 Questioner: If we had constructed a ritual of our own with words used for the first time in this sequence of protection what would have been the relative merit of this with respect to the ritual that we chose?
Ra: I am Ra. It would be less. In constructing ritual it is well to study the body of written work which is available for names of positive or service-to-others power are available.