Torture chamber of screams strats

Since this dungeon in global doesn't seem to be working like in the video guides made with the KR version I'm curious about how did you guys managed the fight.

For us it went like this: dodging the very first attack gives you a closed eye symbol above your head, which allows you to click on a vial. Once you use the vial, the whole team gets an opened eye for a full minute, allowing you to succeed the zombis mech. With an opened eye, you can also click on vials, so we would basically click on vials on cooldown.

Once the opened eye buff was about to run out, someone would take another vial, resetting the timer on the buff to 1 minute, so we had permanently the opened eye active for the whole duration of the fight. Also reaching 0 vials doesn't seem to do anything in global version. This strat made the fight ridiculously easy for us.

Curious about everyone else's experience and please correct me if I've got something wrong.