I haven't tried any bosses as of yet, but IoC weekend starts Friday, it's probably the fastest and easiest way to get honor. Then convert the honor to justice points.

Otherwise I'd consider running: Vortex Pinnacle. The first boss only requires a "run in/run out" set up. The second boss, even with all the tornadoes tossing you around, can be healed through with a blood dk if you have the haste buff. The last boss simply requires you to jump.