Just playing around and came up with a few. Not sure if they're good or not and can't get a lot of useful information, so figured I'd try here. Three in total:
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1) Summon Seraph/Eos:
/macroicon "Summon Seraph"
/merror off
/ac "Summon Seraph"
/ac "Summon Eos"
Kinda in love with this one. When do you summon Eos? When you've been KOed or just swapped Jobs. When do you summon Seraph? A GCD or two before you need Consolation. And what does Seraph require? Eos to already be out. And how do you use Consolation? By pressing the Summon Seraph button.
So how it works is, if Eos isn't out, Summon Seraph obviously can't go into effect, so that line is skipped and it summons Eos. If Eos is out, it summons Seraph, and as she's summoning/once she's out, you can't summon Eos (while Seraph is up), so the the Eos line has no effect. Best part is, the game context swaps "Summon Seraph" into Consolation when she's out (where you can't resummon Seraph anyway while she's already active and the ability's on CD), so this then uses Consolation. And because you don't tend to weave Eos (since Summon Eos is a GCD anyway) and you have time to late-weave Seraph, this doesn't really conflict with anything unless you're trying a REALLY tight weave on Consolation, but you can still spam the button for that. Since you have to use Consolation deliberately, there shouldn't be any time that a 0.5 or so sec difference is going to be the life or death if it gets slightly delayed owing to being a macro.
So it seems not to cause problems or conflicts or clipping weirdness, and my experimentation so far seems to show it works rather well. I'm curious if there are any anyone else can see...
2) DoT timers for everyone but SGE:
/micon dia
/ac dia
<wait.26>
/echo <se.8> DOT wears off in 4 secs
This works for SCH and for AST as well, just change the spell name to Bio or Combust. The neat thing about this one is it will cover all the spell ranks since the game changes that automatically. So you can literally put in Dia or Aero in there (or "Aero II" if you're feeling spicy) and get the same result. It will apply the DoT then set a timer a and chime before it's up to be refreshed, giving you a nice sound que. 26 sec means there should be about 4, or a GCD and some change, before refresh when you hear the tone. You can, of course, change the se.# and the wait to something else if you prefer something else.
The downside is that the wait command is shorted out if you perform any other macro, meaning this is only valid for one target and only if you don't use any other macro. So a Raise macro, a <t> targeting Asylum macro, etc will all cause the sound effect to not go off, defeating the point for that 30 sec cycle. And if you multi-DoT, it only will chime for the LAST target DoTed, so if you DoT the brother/sister duo or the twin lions in the 24 mans, you have to remember that the chime is going off basically as the first of the two needs to be refreshed again.
Still, surprisingly handy. Though I can't figure out a way to make one for SGE. You can make a macro like this using Dosis and just press that button after Eukrasia...but then that defeats the purpose of having Eukrasia to save bar space. No idea how to work around that one...
3) Cure 1 upgrades into Cure 2 at last:
/micon "Cure"
/merror off
/ac "Cure II"
/ac "Cure"
This one's been bugging me for a while. How do I have Cure 1 on my bars when I'm doing something low level but...once I get Cure 2 at level 30, have it on my bar instead?
Well, provided you don't mind your DoT macro being interrupted, this seems to do the trick rather well. If you're above level 30, it will cast Cure 2. Once Cure 2 is casting, it obviously "Cannot use while casting" Cure 1. On the other hand, if you're too low level such that "That ability has not been learned yet" for Cure 2, it will move on to the next line and cast Cure 1.
"But Ren!", you exclaim, "What if I just got raised and don't have enough MP for Cure 2 and am above level 30?!" Still works. "Not enough MP" for Cure 2 and moves on to the next line to cast Cure 1 anyway so you at least get something for your trouble.
The only thing is you can't manually choose Cure 1 if you want a spell to go off 0.5 sec (minus spell speed) faster. But owing to how uncommonly Cure 2 is even cast in the first place, much less Cure 1, and considering we have Benison and Tetra for those cases we need a faster heal/health buffer on the target, as well as Solace, this SHOULDN'T be an issue, as the situation is extremely rare to begin with. With how uncommon Cure 2 is even cast, this shouldn't cause too much pain with the DoT macro, either. And considering it's a GCD, you're not really concerned about the quing issue since you can just slam the button rapid fire if you need to chain Cure 2s for whatever reason. And, having tested it, it doesn't ever seem to "catch" in the middle, so it has always cast Cure 2 when I just press the button rapid fire to see if it would somehow cast Cure 1 instead.
Oh, and if you get a Freecure proc in your oh-so-uncommon Cure 1 spams at low MP...it will use the Cure 2 line and work just fine.
I'm sure there's got to be some downside to this, but as far as I can tell, it works pretty well. Would also work for Benefic (Benefic 1 has even LESS reason to exist than Cure 1 since AST is drowning in MP and Benefic 2 even has the same cast time and only 300 more MP cost instead of 600 more, over double, what Cure 2 is vs Cure 1...for some reason). And technically would work for Physic and Adlo, though that's a bit of a different issue since Physic is both faster and cheaper and stronger than the cure component of Adlo is. No idea how to get it to work for Diagnosis...but then, it doesn't need to be used for that since that's what Eukrasia does anyway.
Anyway, kind of curious what others think.
I also tried one for AST specifically, /ac Play then /ac Draw, which in theory works...but in practice is painful owing to those being oGCDs and trying to high APM weave with a macro just does not seem to work. Like at all. So nice thought, but back to the drawing board on that one, lol
The only major issue is the error message sound effect can get kind of annoying on the Summon and Cure ones...but it's a small price to pay, doesn't bother the DoT one, and considering how un-often I summon Eos/Seraph/Consolation, it's not like it's constantly bleeting at me and being too annoying.
Anyway, thanks for any suggestions or notes or cautionary tales.