Tri boxed it 5 times with 3x ele shams, I just use healing stream totem every 2 mins or so and I'm sweet. Got it down to about 11 mins.

No this is not the best way to get JP, you get 168 at the end with all guild bonuses, that's 2 bosses from a heroic. Might be quicker for some people I spose.

I'm doing it mainly for the 250g you get each time you do it as a guild group (up to 15 times)