What is with these obnoxious boss fights and HOW do you do it?!

[Taliesin]

Its not a wall. Its clear. Who knows what it is? A magical barrier that stops you from walking through it but doesn't stop spells? Who knows? I don't, you certainly can't either.

Then go post your strategy on the customer support forums and seek official approval on avoiding the encounters most difficult mechanic. Until then, I'm calling it an exploit - because very similar encounters in the game were cheesed in similar ways, and were considered to be exploits in the past.

Just because you haven't been caught yet doesn't mean that its legit.

Whether it's considered an exploit or not by any of us, I think you have to agree that it's very unlikely Blizzard intended the walls to work like that. Besides her split at 50%, the gravity well is really her only trademark ability. They may not change it just because they don't really consider it worth the effort to spend developer time on, but I wouldn't be surprised at all if an upcoming patch mentions a change to the walls around her to block any attack from penetrating.

It is a fairly well known bug though, and posted in lots of strategy guides, so I'm sure Blizzard is aware. That said, I haven't heard anyone getting in trouble for doing it, so I don't think they're really trying to crack down on it. I personally don't advocate that strategy.