There is, it's called "Cloud of Darkness" in the duty "World of Darkness" as well as "Eden's Promise: Umbra". Let's cut to the chase here, it's not about the fight. It's never about the fight. It's only ever about the rewards.
This fight IS the medium challenge. It has a handful of mechanics, the mechanics need to be respected for the most part, there are quite a few opportunities to recover when only some people fail a mechanic, a portion of the mechanics can be solved by following a danger dorito, and the mechanics are repeating after half the fight and not escalating further. If the "medium level of challenge" doesn't involve at least semi-properly doing damage, semi-properly doing mitigations, semi-properly doing healing, and semi-properly doing positions / mechanics, what about it would even be the "medium challenge"?