FAQ:How does your pet not take damage? Tiny Dancing Shoes from Soggodon tormentor gives you 100% chance to dodge for 2 attacks. Hunter pets scale off of all of the owners stats, including dodge, so as long as I don't lose stacks by getting hit then my pet will keep their dodge chance. As for the ground pound and ground effects hunter pets also take 95% reduced damage from aoe and is passively leeched back.
For Halkias I was just given a key and let on my way. I first went for Soggodon to get Tiny Dancing Shoes then next went for the 3 shards to spawn the boss. What isn't said in the tooltip is that channeled physical aoe effects as well as physical damage ground aoe effects do not take off a stack of the shoes even if you dodge. This effectively means that you become immune to the shard thrash in HoA, the bladestorm from Deathwalkers and spin up from Headless Clients in DoS, and the ground swirlies from gargoyles in SD as long as you do not turn your back to them. So that is how I dealt with the shards. In the process of doing this I learned that the light beams have a z-axis limit and you can just stand above them if Halkias is tanked next to the stairs. Although that did not greatly affect my run I thought it was an interesting fact I should share.
For Lord Chamberlain I changed to Beast Master because of the way he deals damage to the tank. Specifically that every 30 seconds he puts a dot on the tank that deals a massive a massive amount of damage which I cannot stop. To combat that I had 2 pets out and when one died he had another target to attack while I waited for the next Stigma of Pride. This could have been done as survival with the Craven Strategem legendary to reduce my feign death cooldown to 15 seconds but would have involved running away every 25 seconds and ressing my pet then feigning the threat back to my pet. This would have resulted in the fight taking considerably longer. As it was I was having problems with threat and I did not want to pull aggro in mele range and end my attempt immediately so I made the hard decision to do it the more reliable method and do it as BM. I keep my pet dead on purpose waiting for the next Stigma of Pride to be cast. If I were to res my pet immediately and be interrupted (by an explosive spawn or telekenetic throw) then my secondary pet would despawn causing me to have to immediately start ressing again with full aggro from the boss and then immediately FD to get threat back on my pets, with the threat problems at times I would not have FD up for this. As stated above I could have used the FD legendary to mitigate this threat but I opted not to, honestly because I didn't realize it until after I killed it.