ArenaNet:Guild Wars 2 suggestions/Combing Spells

Combining Spells (Discussion)
My idea is primarily for Elementalists but the initial idea for certain area of effect spells if there are multiple Elementalist in a group who have the spell/s on their build it allows them to have the possibility to combine each others spell if they cast close to the same time and into one big spell that would increase damage and possible area. But to compensate it would be longer cast time and maybe recharge and such. But I believe this idea could bring some interesting gameplay into the game.


 * Why this is a good idea
 * Interesting new gameplay
 * Stronger spells with weaker ones
 * Brings in new kind of teamwork and group effort
 * New possibilities of what could be done


 * Why it may not work out
 * Game Mechanics
 * What to do if one of them is interrupted Knocked down or killed etc
 * Stats on the stronger skills
 * Incorporating this into npcs AI smoothly
 * Potential balance issues