Why do so many healers not use specific abilities?

[HyoMinPark]

I actually see a lot of WHMs and Di ASTs not using their single-target HoTs on the MT. And it gets to be really annoying for me, especially if I'm rolling Noct AST because it's not MP efficient for me to spam a Noct Aspected Benefic or a single-target GCD healing spell to heal up auto attacks because my co-healer won't use their Regen/Di AST A. Benefic. And the majority of the time they aren't tunneling in DPS; they're just standing around, or I guess hoping the Medica II or Di Aspect Helios they spam is enough for the MT. It's a bit easier when I'm on SCH because I can try to place my fairy to keep up Embrace casts on the MT, but I still don't understand the allergy to Regens. I'm not expecting 100% uptime on it, but I expect to see more than 1~5 casts of it in an 8~10 minute encounter.

I've noticed some ASTs don't creatively use their Collective Unconscious for things like stack markers, and instead use them for an Ultimate (like Delta Cannon or Protostar), which they then top everyone off to full and don't let CU's HoT do it naturally. I personally enjoy doing a drive-by CU for stacks if I don't have Earthly for it, because being able to weave it between GCDs now is amazing.

Also, >ASTs not using Earthly Star.
/screaming

I can't speak for others but personally I tend to go full throttle the first few times I clear some content and after a while just get lazy.

Most fights are way too easy once you are familiar with them and thus start to feel like a grind when you (have to) do them too often. How do you deal with a grind? By shutting your mind off and doing the bare minimum needed to succeed. Why carefully plan an earthly star if I just can go full braindead and throw easy aoe heals out there? I mean it's not like the mechanics don't give me enough time to do so.

Once you do a fight enough, your careful planning of healing CD usage becomes automatic. Even in casual content: in V12N, I use my Earthly to heal large amounts of AOE damage, saving both myself and my co-healer the need to use a GCD heal and waste the MP (because we're gonna need it later for raising, typically).

For example, I use it to heal up after Omega-F's Laser Shower about a minute or so in, the one that happens right after the first Optimized Fire III. I also use it to heal up stacks, such as the one during Omega-M's second appearance where he does the donut AOE followed by the proximity AOE (this also helps because it detonates either automatically or at my command, and the party is topped off while moving out of Efficient Bladework - I can save my Swiftcast for something else, and I have no need to cast a GCD healing spell once the bosses stop being flashy; I can reserve my mana).

[Nyxn607]

Once you do a fight enough, your careful planning of healing CD usage becomes automatic. Even in casual content: in V12N, I use my Earthly to heal large amounts of AOE damage, saving both myself and my co-healer the need to use a GCD heal and waste the MP (because we're gonna need it later for raising, typically).

For example, I use it to heal up after Omega-F's Laser Shower about a minute or so in, the one that happens right after the first Optimized Fire III. I also use it to heal up stacks, such as the one during Omega-M's second appearance where he does the donut AOE followed by the proximity AOE (this also helps because it detonates either automatically or at my command, and the party is topped off while moving out of Efficient Bladework - I can save my Swiftcast for something else, and I have no need to cast a GCD healing spell once the bosses stop being flashy; I can reserve my mana).

This is a good use of Earthly Star. My issue when I use it, even when placed properly, half of my team (usually pugs) just stand outside of the range so I need to burn MP to heal them anyway. It is very annoying lol.

[JunseiKei]

This is a good use of Earthly Star. My issue when I use it, even when placed properly, half of my team (usually pugs) just stand outside of the range so I need to burn MP to heal them anyway. It is very annoying lol.

+_+ Sacrifice!

[Mansion]

This is a good use of Earthly Star. My issue when I use it, even when placed properly, half of my team (usually pugs) just stand outside of the range so I need to burn MP to heal them anyway. It is very annoying lol.

That's when I play the "How low can you go?" game with cheeky DPS (mainly ranged) don't get in my Earthly Star.
Usually they end up coming by my side to signify their need for a full HP bar