How to order the elements, and if its nessesary?

Richard

Another possibility is to follow the order of the zodiac: fire, earth, air, water. I learned astrology a long time before I knew about tarot and this is for me still the "intuitive" order ;-)......

It seems natural to me too. Note that if you go around the zodiac clockwise (backwards), it cycles through the Qabalistic order: fire-water-air-earth.