At the least, harder challenges should be worth a nice boatload of XP.
In general, bossfights don't really give any serious XP or gold rewards. Some offer good loot, but many others don't.
Nothing will break if the Dragon Challenges (taking relatively easy ones, without high-end loot, for an example) will each be worth 2x, or even 5x Voltabolt's- they take much more times to complete, and actually provide... well... an experience.
His followers called him Mahasamatman, and claimed he was a god.
He never claimed to be a god, but then, he never claimed not to be a god.
Circumstances being what they were, neither admission could be of any benefit.
Silence, though, could.