Blade Barrier.

Should a healer be able to flee continually and put it up over and over again without any wait time. Blade Barrier does Oblits to Annilates each time making them impossible to engage. Not only that, should they be able to heal others and themselves and to rest while in Blade Barrier? I would think the Blade Barrier would make it impossible for them to heal others since the blades are in the way. Seeing that there is no way around it, its pretty cheezy that a healer can just flee and put it up over and over and over again, for their own personal chargeset.