So you are bored of farming some mount/mog and want increased drop rates basically with the "challenge" excuse.
I don't care but i would not do it, it will NEVER be worth your time. Guess why? Even if you have a version of any raid that drops, lets say, 3x the normal loot with a challenging difficulty, i rather do 3 runs of that thing on a faceroll difficulty while watching a movie or something. For it to be worth it needs to be something like...10 times more loot? Then you have problems with a new in-game gold source.