Originally Posted by
Mysterysword
I really don't get why you seem to be constantly equating Urianger's wards with Sharlayan's wards. Maybe they stem from the same principles of magic(and that's a shaky assumption to make, considering all the very different schools of magic that Sharlayan practices), but that says nothing about any unique twists Urianger might have added himself, not to mention the fact that a short-term ward, meant to temporarily seal off an area, and a long-term ward meant to protect an entire nation, would be very different in terms of scale.
Simply put, just because they couldn't take down one, doesn't mean they can't take down the other from the inside. Also, you would think that, considering the Sharlayans had the entire Isle of Bal dedicated to studying the Echo, they would know if the Echo could take down their wards, and be accordingly prepared. Not to mention, the Garleans have spent decades studying magic, even if they can't use it, and adapting their magitek to defend against it.