I've been looking for a catch all thread to post tips and tricks (as well as do's and don'ts) for dealing with specific things (maybe even obscure things you don't regularly have to deal with or things that change in the dungeons depending on m+ affixes) in Legion dungeons and I haven't really seen that as a thing on these forums so here goes.
So to start it off I'm going to talk about Eye of Azhara. First off, this dungeon is really really easy but a lot of people who play this game are very bad.
First let's talk about trash count. When you're doing EOA, regardless of the difficulty or the affixes, never pull the big water elementals, but especially do not do this when you have fortified as an affix, and especially never mass pull them with other adds, they simply do a lot of group wide damage that is hard to deal with, and especially in conjunction with a Hatecoil Arcanist. There is a high probability that your group will wipe (affixes and key level depending) if this ever happens.
And besides you can get all of the trash you need from this place without ever killing them. In fact you can get over 70% of your trash count from the crabs, giblins, slimes, hydras, crab people and other things in the area around Serpentrix, regardless of the Affixes, teeming or not does not change this, you can always get almost all of your trash count from there and there's no need to do something stupid like the tank in my last dungeon did, which was pull the 2 giants at the cave entrance, totally forget about the Murloc group that paths there, and then try and blame me because I the hunter "pulled them" to the tank when they were definitely going to get pulled no matter what due to our groups positioning.
Besides, never pull those things anyways they do a lot of dmg, take a lot of time to kill and are 100% unnecessary for your trash count, especially in 7.2 why? Because the 4 summoners you have to kill to unleash Wrath of Azshara give trash % now.
Which leads us to this: the absolute best case scenario boss order is: Warlord > Serpentrix > Hatecoil > King Deepbeard and then of course Wrath of Azshara.
But here is the thing, by the time you have killed the first 3 bosses you should already have nearly full trash count, and all that should be left to kill are the 4 summoners and Wrath of Azshara. Guess what guys? As of 7.2 the combined 4 summoners give you just under 8% trash count. So what does this mean? It means that if you're over 90% (which you should be at that point) all the remaining trash you need to kill are the summoners, if you need something else there are definitely stragglers around Serpentrix' area you can pick up.
So why is that the best boss order and the best way to get your trash count? Might be confused about something? Because you do not need to go through the cave to get to King Deepbeard, all you need is a 3 person mount, 1-2 swapblasters and a class that is capable of either stealthing around to the boss (rogue, hunter) or a demon hunter or warrior that can easily jump from the ship near Wrath of Azshara to the cliff in King Deepbeard's area.
P.s. if you decide to get most of the trash cleared before Serpentrix (which you should because it is the most time efficient way to do things), Serpentrix is where you lust a 2nd time. Why? Because you can in fact use bloodlust 3 times in this dungeon unless you are 3 chesting, in which case lust shouldn't even be off cooldown yet by the time you're through killing serpentrix, in which case always save it for Wrath of Azshara because it will help there more than anywhere else.
If I've left anything out feel free to add to this, hopefully we can get some useful discussion going here.