Endgame scholar healing
To start, a few disclaimers. Everyone heals differently. Healing has no "rotation" so my methods may not work for someone else, just as theirs may not do it for me. It also requires flexibility and awareness to evolving conditions that develop in every battle. However, I've seen a lot of scholars that either lack efficiency in their class, or simply don't realize their responsibility as MT healers in full party content. Therefore, this guide is for the scholar looking to pair and heal smartly alongside a white mage partner. Rather than talk about specific end game heals, it's about translating your skill set into a very precise job (healing the main tank) that will give you better synergy when you start healing with another player. It's a bit long winded and more than a little scatter brained, but hopefully this guide helps a few scholars get started on taking on the big baddies!
This guide assumes that you have a basic grasp of healing, and that you know and understand the basic pieces of the scholar toolkit. I assume that you will be using eos, and that you are capable of basic pet managing. I'm classifying endgame content as content starting at titan HM, since it is the first encounter to have a steep heal check the likes of do not come up in previous bosses and trials. You can follow these guidelines as you progress to more challenging eight man content.
First up, play a white mage if your play time allows it. The more you play a white mage, the better your feel will get for their heals, and how their abilities will interact with scholar heals. As a scholar, your ideal partner will always be a white mage. As such, having a working knowledge of how their abilities and cooldowns work will allow you to maximize your tools. Learn to let a white mage's regens tick the raid back to full when safe and watch for vital cooldowns like benediction and divine seal. If you can play with a static partner, both of you will become stronger healers over time as you come to learn each other's nuances. This will help you define your role as a scholar.
The most powerful ability you can possibly acquire is to respect the synergy between healing classes. Being able to place faith in your white mage to patch up the raid while you focus on the tank is equally as vital as knowing when to spread your heals among the raid with succor and whispering dawn. Likewise, your counterpart is going to rely on you to put as many heals onto the main tank as possible. Because mp is such a strain to white mages, they shouldn't need to do much more than maintenance cures or regen on the tank when spike damage isn't a threat. Outside of this, you should be the one to focus on the tank and keep them as healthy as possible using all of the scholar's expansive skills.
The scholar toolkit
Physick is and always will be your bread and butter heal. If you have nothing else to do, you should be precasting physick for the next hit. Coupled with your fairy's embrace, physick spam will suffice for almost any fight that is not healing intensive. If the tank's hp begins to dip, you'll want to quickly correct with your next heal.
Adloquium. You all know how it works. You've been using it since level 30, and you know all about its value when it crits. The problem with most scholars is WHEN to cast adloquium. Adlo has the most value when applied before spike damage such as mountain buster, death sentence, etc. so that the tank doesn't dip close to the red zone. In case you haven't set foot into titan hard mode yet, mountain buster is a move that will chunk a good 5000 damage from your average tank. A well placed adlo can shield the tank from at least 10% of the blow, depending on the potency of your heals, and ensure that the tank doesn't meet a swift end from the next auto attack. Of course, this means the best use of this skill will come from having knowledge of when these spikes will occur. On intense fights, especially those with unpredictable damage, you should apply adloquium, followed by physick (one to two casts), followed by adloquium. Ideally, this will keep your tank at or above 80% before needing to use lustrate (which will be discussed shortly). Note that this healing is for maintaining hp during intense, bursty damage that you would want a shield up all the time for, such as caduceus (turn 1)or dreadnaughts (turn 4). If physick spam can cut it, that should be your go to choice
You should be well aware of your available cooldowns and when the best time to use them is. Eye for an eye is best placed well ahead of spike damage, while virus is best applied shortly before. Eos' whispering dawn is a great HoT that costs nothing, and fey illumination is a very nice straight boost to healing. Rouse your pet if things start getting out of hand, and don't be afraid to do this often. 60 seconds is a very short cooldown, and one that shouldn't go wasted. But of course, the most important cooldown of all-
Aetherflow
Again, you know what aetherflow does. It's a vital skill, infinitely so once you've gained access to lustrate. 20% mp boost aside, aetherflow will grant you those three precious stacks. How you use them is critical to your success. Energy drain loses some value in the endgame where accuracy becomes an issue, and energy drain hits less reliably. Bane is quite simply not going to be used in most endgame encounters. That leaves us with...
Sacred soil and lustrate. Sacred soil has a fairly limited utility when it comes to efficiency of aetherflow stacks. About 15k damage needs to be sustained by those under the effect of sacred soil for it to be more efficient than using lustrate to heal 1.5k on a 6k hp paladin. Considering how uncommon this is, the majority of your aetherflow charges should be spent on... Lustrate!
Like adloquium, when you use lustrate is going to define a lot of your success when it comes to the endgame. I see lustrate as easily the most powerful heal in the game. It's near instant, and even on dps it will usually heal around the same as physick. However, you should stop looking at lustrate as an emergency heal starting now. If your tank is below 50%, there is a huge risk of something like caduceus hood swinging your tank to death with an unlucky crit before you ever have to chance to react. By using lustrate as a maintenance heal to weave between adloquium and physick, you can ensure that your tank stays not only topped, but shielded as well.
However, lustrate does have a weakness, which is, of course, that it can only be used three times every sixty seconds. If you use lustrate as an oh s--- button, this problem only gets worse. Needing two or three stacks to bring your tank up means you'll be sitting at zero stacks for the next 50 seconds, which is no good. Ideally, the need for lustrate should come up every few GCD's, so that their use is spread across the 60 second aetherflow cooldown.
Finally, let's talk about how you should put these skills together to make a powerful mitigation and single target healing machine. For raid damage, usually one or two succors along with whispering dawn will help your white mage in topping everyone off. If you anticipate this damage and know that the party will take at least 1-2k damage, you may want to consider sacred soil, which will go a long way towards preventing your incoming damage.
When it comes to spike damage, make sure your tank is topped (using lustrate as a maintenance heal if needed), immediately followed by adloquium. Ensure that your white mage companion applies stoneskin if possible, which is more effective than your cross classed version, and brace for impact. If virus is available, use it! Time your physick cast so that it goes off right after the damage hits while your partner does the same, and be prepared to lustrate if things get dicey. Once the tank is back in the green, immediately fall back into your healing rhythm, whether it's physick spam or adloquium rotation. Maximizing your mitigation on this kind of damage will keep your healing as smooth as possible, and will decrease the likelihood of you, the white mage, or the tank from panicking and possibly blowing a vital cooldown that could have otherwise been saved.
Getting 100% out of your scholar isn't easy, and the clunky pet controls don't help any. However, with smart healing and good synergy with a white mage, you can be well on your way deep into the binding coil, and push your potential to the max. Good luck out there, and happy healing!