Interesting idea, but I see a problem with this. For combat magic, anyway.
No monster would allow itself to actually be surrounded, and if it werre, would go on a killing rampage. Unless the mosnter were either sleeping, paralysed, unoconscious, superbly arrogant, and so on, anyway. Or there was a method of distracting, but the \'distracting item\' may be destroyed along with the monster.
However, out of combat, Circle Magic whould be a fascinating concept. It will, however, force shy people who aren\'t that great at walking around, talking animatedly to random others, to get out of their shyness. Still, as this is a MMORPG, this is unlikely, but it can happen. Some may view this as good; others, bad. And when I think of a circle, I am thinking of ten or so mages, and of course, in a circle. If there are no nearby threats, the problem would be gathering mages. Especially if you\'re not in a guild and don\'t want to be in one, for various reasons.
I like this idea, but there are the factors of balance to be controlled. The balance issues mainly being mages becoming too powerful. Drilixers thread does this well for warrior and rogue-type characters, but why not use this in other jobs as well? Of course, this thread is based mainly on magic, so I\'ll leave things off there. I\'m rambling on and on again...