I found this thread that had a similar idea for a Red Mage, that I helped the guy iron out his idea. Now that you have some more info added to your initial post I can it out for you as well. But the idea is still yours, though i will take partial credit for the elemental idea, I had that for a while, lol. I'll update this post as soon as I can.
http://forum.square-enix.com/ffxiv/t...pt%21%29/page2
here it is, hope its okay for your needs
Fencing Stances
The strength of a Red Mages physical attacks rely on how they can effetlessly transition from one stance to another, to build up their magical energies. They start out in Garde Stance and continue into Prets and Allez to finish their assault. Upon completing a move in Allez stance they gain a Mana Charge stack increasing their magical attack by a percentage depending on the stack amount, 1-10%, 2-20%, 3-30%. Stacks last for 60 Seconds
Conquest and Submission
Withing the Creation of the Elements, there lies the Pyramids of Conquest and Submission. By using the elements in this way Red mages are able to inflict a myriad of status ailments on their opponents. For each element use in either a Conquest or a Submission manor, Red Mages gain a Forte Charge stack, increasing their physical attack by a percentage depending on the stack amount, 1-6%, 2-12%, 3-18%, 4-24%, 5-30%. Stacks last for 60 seconds
The idea is to build up to one full stack and use it up while building up the other for instance. For Instance, you start out using your physical attacks to build up Mana Charges. Once you reach 3 stacks, you switch to using your magic attacks, and use them and build up Forte stacks as well until the 60 seconds is up, then you go back to physical attacks and continue as such. It's similar to transitioning between Astral Fire and Umbral Ice but is a bit more forgiving, in that both stacks can be up at the same time.
I'll add more a bit later, I have to sleep, T.T