It probably doesn't need to be mentioned but playing a mostly pure, unarmed monk (damage has not kept up too well across updates excluding use of Mortal Fear Thunderforged wraps) that relies heavily on stuns in the mid-high 70s (seeing how QP took a hard hit in past updates) is rather painful to play given the saves of these mobs.
Don't really have an great answer on how to keep challenge in but make DC reliant toons viable in this content, but I'm just wanting to report that it makes wanting to play an unarmed monk less appealing.