If consciousness is imagined as a space we can move around in, then it is a space of several dimensions. An indispensable tool for any magician is a method for describing this space and its dimensions, a method to specify the "the coordinates of consciousness", like giving a map reference. The magician uses such a descriptive method to say "this is where I want to get to", and you can imagine a ritual as a vehicle which transports him or her to the destination and back again.
A descriptive method of this type is one of the most obvious and characteristic features of a particular magical technique, because states of consciousness are usually described using a dense mesh of symbolism and metaphor, and if a magical tradition has been around for any length of time it becomes identified by the details of this symbolism. Given the tendency for maps to be confused with territory, there is a tendency for symbolism to take on a life of its own and become detached from authentic magical technique. People confuse magical symbolism with magic; its use as a coordinate system is lost, vast tomes of drivel are written, and every manner of absurdity follows.
Symbols can be diffused when people work together in a group. It is a mistake to believe that "power" is raised in direct proportion to the number of people taking part in a ritual. Something may be raised, but just what isn't easy to predict. Unless people have been trained together and have similar "maps", then the ritual will have a different effect on each person, and although more power may be raised, it will be unfocussed and will probably earth itself through unexpected channels. When people begin working together there will be a period of time when their work together will probably be less effective than any one of them working alone, but after a time their "maps" begin to converge and things start to improve dramatically. There is nothing magical about this - it is a phenomenon of teams of people in general.
Does it matter what map, what system of correspondences a person uses? Is there a "best" set? This is an impossible question to answer. What can be said is that working within any magical framework incurs a cost. The more effective a magical system is at limiting, engaging and mobilising the creative power of consciousness, the more effective it is at ensnaring consciousness within its own assumptions and limitations. If a person works within a belief system where the ultimate nature of God is pure, unbounded love, joy and bliss, then that closes off other possibilities. (Spiral Nature)