Easiest to hardest in my experience.
Shado-Pan Monastery
So easy. Just use the bug where everyone except the tank cleanses the first set of purified defenders and if someone gets pulled away by the mobs you still have an extra pack to kill anyway. Pull the entire first room and bloodlust or chain defensive cds early and you'll be fine. Other than that, it's very very simple. Invis after the boss with the trainees to the bridge, you will pull the pack that is on the bridge without pack/roar.
Mogu'shan Palace
Not very hard at all. The only issue we had was that sometimes the patrolling mogu+dog would sometimes get pulled with the first 2 guards at the beginning. Dispel debuffs that are longer than 8sec, don't stand in the fire and stack up for the last pack of dogs. Invis after the elevator to run into the boss room.
Temple of the Jade Serpent
About as easy as Mogu'shan Palace. Make sure DPS and healers get to the other side of the water pools before the first boss and save bloodlust for the 3rd boss. Don't bother running up to the balcony on the last boss, since moving is a gigantic DPS loss and it won't save you those few seconds you might need. Could be worth doing if you know for sure you get a second banish phase beforehand though. Try not to. Invis the pack on and after the bridge before the 2 swamp beast boss. Healer MUST dispel on the 3rd boss. Don't get hit by the fire waves either.
Scarlet Halls
Handle the dogs at the start well and hopefully use rocket boosts/disengage to pull the next pack with the shields. Personally I had to use rocket boosts and wait until the shield was actually on my character or else I wouldn't get a shield. Invis the entire hallway before the whirlwind boss, but pull the last pack before going up the stairs. Ranged stay up on the whirlwind boss and jump down and run up the small stairs and wait for him to come down again, then jump down and you should be safe. Can pull the entire last room before the boss if you have AoE stuns/interrupts.
Scholomance
If you pull the first boss midair, everything except the patrolling big adds disappear. Bloodlust here and on the last boss was our best strat. Your healer CAN go DPS for the girl boss to push her before she shifts phase. DPS should save cooldowns until 50-60% since she starts the RP around then I think. You can invis the entire room with the Doctor and the students. Get a vial of things from him from normal mode before actually doing it since it gives a buff against all the mobs in the dungeon. Get the macro or addon for the boss who spins.
Gate of the Setting Sun
Make sure everyone knows their relative position towards the bombs before and during the first boss and everyone stay on the tank during the boss who starts strafing runs. No invis here. During the 3 mobs after you leave one tower (sorry, can't recall which, I think it's the one right before the elevator) you can CC 2 mobs and kill one off. 2 mobs is the exact amount you can skip. Make sure to reCC when you run back. On the last boss put any DPS with dots or huge burst with low CD up first. The safe spot has 7mill HP in CM I think.
Siege of Niuzao Temple
Pull the first pack, interrupt both the amber-shapers as they immediately start casting the stun. Pull the blobs, pull the next pack and then pop defensive cds when you kill the next set of blobs cause they will hurt like hell. Barrier and similar works well for that pull. Then pull the boss and pop lust. Wait for debuff to drop off and then pull the blobs after. I think you can invis here, but I don't remember if we did.
On the second boss you can toss the amber in one spot and have the tank make sure the adds are standing in it. One DPS should do the gong when it's up and another should kill the suicide bombers. Skip ALL mobs until the third boss, run around the 3 stationary packs. Recall all pets around 80% boss HP and wait for bombs to drop. Tank takes the 3 packs and runs into the boss and the DPS tosses bombs on the boss. The Engineers don't follow you around corners before the last boss.
Stormstout Brewery
Less hard than hyped up to be. Just some good healing alemental RNG on the last boss can do it.
Our only problem was the last boss and sometimes the rabbits. Have one DPS kill the small flying alementals in the beginning and then kill the bombs in the next room. Kill the 2 big monkeys who are almost dead then get 40 monkeys while slowing as much as possible and trying to take every barrel. Position the boss where you came from and he will take 2 barrels each time naturally in addition to the ones you are sending on him.
Mark one rabbit with a hammer and kill it. Pull all of them to the last room and DO NOT ROOT THEM. Then hammer away. Ignore the second set of adds on the boss as they despawn when he dies. Last boss, DPS/Healer are responsible for one corner each, stand infront of adds. You can interrupt them and make them move, but they might run on top of the boss and make it impossible to interrupt. Pets can stand between the adds and the boss to interrupt too. A lot easier as a Mage if you use the glyph to make it larger. Can be worth standing still and eating the stun if you have 2 adds slightly at an angle that makes it hard to regain the interrupt on their heals. No invis, use DPS pots on last boss. You can skip the 4 patrolling adds after the rabbit boss if you just follow behind them. Don't get hit by the ale spewing down from barrels, that pulls them.
Scarlet Monastery
Have a macro to target the pile of corpses and spam it then mark it with a skull, have the Scarlet Flamethrower facing away from the group. Focus both of those down then use the backpack bomb from the flamethrower to kill the undead. Don't pull anything after that pack.We found that killing one set of ghosts before the first boss was the way to go as the damage was just too high.
Pull the boss with the other pack of ghosts and bloodlust/DPS pot.
Kill the next 2 neutral mobs while someone marks the next pack. Focus interrupt your assigned targets and kill the purifiers. Move out of Flamestrike if it's ever cast. We used barrier for this.
Invis the entire outside up to the monk boss and have the healer stand away from the group and tank the boss with everyone else in melee range on one side of the waterfall. Move out of Blazing fists as a tank since it hurts like hell and move out of fire patches as DPS.
Only the healer moves from fire spin. Don't pull any adds.
Run perfectly between the two benches into the monastery and go left and single kill the 2 purifiers. Then LoS the pack on the other side and repeat. Stack up on the boss and have players assigned to interrupt the cast of mass ress AND someone else for the MC cast.