Bounties on T6. Unless you have immunity necks then you're looking at Malth farming etc.
Malth was fixed, I believe bounties are the fastest way atm.
Yeah it was fixed from being mega exp but its still decent exp if you are into that sort of thing. Myself I have been running bounties on T6 and collecting some of the cache only legs I am missing mogs of. One nice thing about M if you have immunity necks you can, depending on class, get away with wearing full exp gear. Gets boring after a few hundred paragon.
fastest paragon xp per hour?