stone dogs
so he should prepot on the pull, and while not really a massive gain should do in the fight as well - can couple as a CD 4000 parry for 25 secs is quite nice sometimes
he has boneshield on the pull which is good - since long duration can basicaly keep higher uptime like this, but he only uses it once again in the fight near the end - could of been used 4-5 times easy
army should really be used on the pull for the dps gain and not in the fight kinda just waste unless a specific mechanic requires otherwise.
some of his crimson scourge procs he is sitting on too long.
and DRW should pretty much be used on CD on this type of fight just for the dps inscrease.
improvements would be just higher uptime of diesease and CDs
feng
pretty much the same - cd usage slightly better than dogs but still kinda bad, and uptime on diesiease should be higher.
troll
same again - main point on this one is sat on crimson scourge procs for a very long time. but better desiease uptime. on this fight deathpacting your pet - gives a very nice damage inscrease in the other realm, if damage isnt that high so might be worth doing if not needing the healing on the tank.
kings
AMS should be used at the end of cowardice this absorbs the damage effect and also means you come out with no buff (used 5 secs til end of phase) which is nice since meng hits like a truck on meth
cd usage pretty poor again
even when not tanking can keep boneshield up so its got higher uptime and usally off CD when needed. its also not advised to spread dots to your friends when MCed - kinda damaging while low ticking still waste of healers mana.
sum up
should get something to track buffs like power auras or weak auras since his uptime is pretty poor and should use army on pull not mid fight. also might want to get glpyh of VB since the extra healing is kinda better in most cases than the small hp increase