So is there any kind of mechanic associated with that blue marker? We've gotten it to randomly not do ridiculous damage and we aren't even sure how. It hits the tank really hard for a non-raid tank buster, especially considering you might not have a healer with shields/shields on cooldown from protecting the non-tank from the blue marker.

I'm all for tough fights as long as it's clear why you are dying. Like, the final Arboretum boss is tricky but if you wipe to it it's VERY clear what did it.