There is a way to jump off, from what ive heard, there is a spot where you can glitch through the barrier if you jump at or run into it just right.
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If I am understanding what others have said correctly (I was not aware of this exploit until SE announced it), this is how it worked:
WHM casts regen on tank.
WHM jumps off the cliff while no one is in combat so that the WHM will still have 1 HP.
Tank runs in but does nothing else.
Titan runs for healer because regen is ticking on the tank. (If a tank is pulling mobs and not using abilities, the regen will be enough to aggro the healer -- you've probably seen it when tanks pull groups of mobs... some will go for the healer if the tank doesn't AoE fast enough.)
Titan can't hit the healer because the healer is out of range, but right now, the healer has hate.
Healer spams Medica II for hate.
DPS and tank make sure to not pull hate away from the healer (watching aggro meters) while DPSing him down.
Healer keeps spamming hate-generating abilities. (I'm not sure how the healer doesn't go OOM... unless the bard has manasong up.)
Titan's programming 'breaks' because he can't target his target. He stands there and looks silly while people kill him.
Now that is an exploit. And ppl claims speed runs are (-_-lll
Make me wonder now how many ppl actually cleared Titan using this...
I'm curious (and no, i haven't done it) if there will be any punishment to the exploiters of it. It's clearly sounds like they knew it was an exploit, especially the ones who sold runs.