A friend and I decided to try and take a Dark Jedi with just the two of us. But he ended up getting one shotted after our pets got owned. This dude was mean. He took down a 9000 hp pet with armor rating 2 in like 3 hits.
I knew the odds were against me, but I fought on. Here is the results. Close but no cigar.
As you can see when he hit me it hurt like hell.. 2700+ damage.. Ouch! My friend ran back while I was still fighting him and ended up killing him with 1 shot after I got him down so low. He didn't drop any loot either.

That sucked. Anyway, we picked up another mission to kill another Dark Jedi and we won the 2nd time. The guy dropped a bowcaster, EE3 Carbine and numorous other items. Gotta love seeing the Lightsaber though. Pretty cool stuff.