My guild put about 30~ attempts into H guards and never really made that much progress at all, partially because our offtank is incredibly undergeared or was at the time and if she ever had more then 1 dog on her she would get gibbed. As far as i understand it you are suppose to let unmitigated overloads go off in order to better control which dog is petrifying to break chains/pop mines when you may need to. Because for us we would just constantly get Jade or Cobalt and with 2 melee a lot of us would have to sit in melee and ended up either dying to chains from going two different ways around a mine or people just not being able to see mines because of the massive clump of spell effects/ground effects in the stack pile. Is it the correct way to let unmitigated's go off or just go about how we were doing it and try to avoid mines more?
Also on Feng for the shadow phase we just cc'd bursted all the waves of adds down but occasionally one would slip through just heal all the dmg we had done to him. I've heard the barrier is used in some way during this phase so i assume its either used on the adds somehow or you use it on Feng when the adds are about to heal to negate the heal, which is it =D?