Never heard that one in any group or alliance chat. o.o Though I admit I love nothing more than sprint to the middle of the circle and aura blast the whole team off the circle, claim it as our GC's spot and then mingle outside of the circle when my group charges to defend it. x') Not the wisest tactic, but it's still fun.

But you do what you can as a healer to keep your group (and most of all yourself) alive, if it requires you to stand outside the circle, then you do just that. Don't see how one person outside the clashing-zone will make a huge difference when fights and players tend to move fast.