Lol, thanks for that little slice of reality
I wouldn't consider it so much a retard check as a pretty complex fight which stacks 4 tough mechanics. Basically you have two characters who increase in power as they come closer to eachother and so have to be kept apart, one of whom is ranged and casts slow travelling lightning balls that need to be evaded, also casts a short-duration hard hitting AoE that you have to get out of the way of, and one of the two spawns hard-to-see ghostly adds which hit hard. It's not a fight with phases as you might see in wow.
If you're an organised guild group where people have read up on the fight and picked a good strat, it's probably ok. For pugs or spur-of-the-moment runs with more than one newbie and no-one explaining, it's not a good fight. Not so easy to work out on the fly.