Dual Blade Mechanics

Another thing you should keep in mind with Chains of Hell is that it requires you to be in Dark Sight to use; unlike Assassinate however, you aren't guaranteed to exit Dark Sight after usage, so if you're struck while in Advanced Dark Sight, you may have trouble getting out to pot, and any excess amount of lag, even the smallest amount can prevent you from exiting, since you're required to either re-use Dark Sight, or click the icon at the top to guarantee an exit.

This remains to be seen as we still don't yet know how dummy effect works. If the dummy isn't hit by physical damage while in dark sight, but takes the magic damage while in dark sight, that's yet another plus for this class.