I've found a way out that does not involve engineering at all. You'll need a mushroom chair (or a Mage with Blink) and a method of slow fall.
http://www.ownedcore.com/forums/worl...tch-5-2-a.html ([VIDEO] Throne of Thunder (Raid) - Exploration patch 5.2)
I was also able to glitch out of the building by using a giant-growth underneath these stairs:
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