He's not a raid target, he's just a regular named mob in an exp zone. The experiment area of Kaesora is a step up in difficulty compared to the library/beyondling area. Most experiment trash does some sort of special attack (rampage/whirlwind/etc) so if you pull several at a time you can get large spikes of damage on people if you're not paying attention. I'd say a group that can do HHK/FR could do experiments as well.