Once you to get to level 62 (?) you get an ability called Excogitation that is really useful for this exact situation. Once you get used to using it on pulls like this you can give yourself much more time to DPS easily without having to worry about the tanks health (since Excogitation goes off at 50% and is extremely powerful at 800 potency).
Pre-60's, if you find yourself unable to keep up with healing don''t be afraid to spam Adloquium and Lustrate. By judging how much damage the tank is taking, you can figure out whether you'll need to supplement your Adloquium with Lustrates so you can meet healing requirements. Obviously you need to be careful with MP when using Adloquium, but any MP you have left after an encounter is generally considered \\'wasted MP\\', so don't worry about blasting through everything you have as long as it keeps the tank alive until the end of the fight. Just be aware that you can't do this at level 70, since you need the MP for Miasma II, Miasma/Bio, and Broil spam. Using
Being able to predict how long the fight will last and in which way you're going to approach healing is crucial to playing a Scholar, as it will increase your chances to deal damage which is considered a major aspect of the job. If you plan on playing a Scholar in higher level content it's important that you're able to take every opportunity to deal damage, so knowing how to create openings to maximise your DPS is what's needed to be considered a 'good' Scholar. Getting used to spotting these openings is a good skill to have if Scholar is something you wish to use in higher-end content.
Also keep in mind that at level 70 you will very rarely need to heal with Physick, so I\\'d recommend getting used to doing as much of your healing through off-cooldowns as possible (e.g Lustrate, Indomitability, Whispering Dawn, etc). Naturally, since you won't have access to abilities like Excogitation and Fey Union at your level, this isn't extremely important, but trying to reduce the amount you cast Physick to be as little as possible is a very useful to know because of the expectations people have of you as a Scholar to always be maximising DPS.
Of course, before you get these abilities I think getting used to healing with Aetherflow abilities, Fairy, and shields if the need arises is more crucial than learning about DPS openings. Lustrate is, of course, one of your key healing abilities, and knowing how and when to use it will make things much easier. Following Adloquium (or Physick if you're using it) with Lustrate can often be enough to bring the power of the two closer to what Cure Ii or Benefic II will heal. You should have Sacred Soil at your current level, but don't let it fool you. It's very rare that Sacred Soil is ever worth the Aetherflow, unless you know the entire party is going to take a large amount of damage, otherwise it's simpler and better to just use Indomitability or even Succor and Emergency Tactics if things take a turn for the worse
Also, keep in mind that the cross-class ability Largess isn't as useful to a Scholar as it is to a White Mage / Astrologian, since like I said most of your healing is done through abilities not spells, and Largess only increases the healing potency of spells cast. This doesn't mean it's not worth using, but considering how you'll be healing and adjusting your role skills accordingly can help a lot.