I've spent about 10 hours now trying to solo him, but it all eventually boils down to the enrage timer. I've managed to get him down to 23% or so however, this is where the enrage timer kicks in and *poof* I'm dead.
I'm well aware of the videos on youtube doing it but none that I've seen is showing their vengeance stacks which makes me suspect that they were done in 5.3 where standing in defile booster your vengeance.
I on the other hand have not been able to get my vengeance above 30k or so. Should I try to get more retri gear in order to increase damage taken in order to boost vengeance? DPS-wise I'm hovering between 200k (start of fight with ghouls) and ending at around 135-140k dps. I have one cleave trinket with a strength proc so doing a single target rotation on LK is enough to kill the ghouls before second transition is over.
Edit: Link to my pala's armoury http://eu.battle.net/wow/en/character/shattered-hand/Lardin/advanced