The joke is expecting a reward for little to no effort. I'm satisfied with the level of difficulty compared to the reward. In fact, I chose to solo the monster to feel the full weight of my efforts rewarded against this enemy. I started the trial with a friend and two alt accounts then logged them out and buddy quit. The fact that you get exemplared made it all the more challenging since I didn't have access to my higher tier primary and secondary powers. It was one of the tougher monsters I've soloed, with the pets being resummoned frequently and the large health pool. But boy if I didn't enjoy that challenge! And I got a nifty badge for it. I can't see how there is anything to complain about. Especially considering the content was added with the best of intentions for the community and cost me absolutely nothing to consume.
And just for context, yeah - it's a monster class enemy. Like monster mash, ya'know Halloween theme and all that? 👻🎃😱