Finally got LK25 heroic down without dpsing during transition with 516ilev. For me at least I kept get blown off by ice sphere. I seemed to be perpetually silenced by the raging spirits and seemed to have always have 1 or 2 of them chasing me and kept running away. SO I changed it up and refreshed disease on LK during transition and dps down 2 ranging spirits each round. Was full raid buffs and a prepot str potion. I was just able to get him down right after 3rd chamber room. He his enraged at 11m so had to fight through a few sec of enrage till hitting 10%.
Its a pretty sloppy way of killing him, If i could be more confident on ice spheres I would be able to dps through transitions but as of now im on the steps instead just outgearing the fight and zerging LK when he comes to me instead.