How does one overheal exactly..?

[Saseal]

Over heals?

Divine Seal + Medica II + Regen + Asylum + Assize, then proceed to PoM and Cure II/III and Medica bomb the tank in rapid succession. While there is a single enemy.






But seriously, almost everyone is going to overheal one time or another - whether it was a misjudge of how much HP was lost, miscalc on how much HP was going to be lost, two healers healing at the same target over each other, or setting up HoTs to DPS, like what I do - when I know a tank is going to pull big - like first/second island of Neverreap - I divine seal just before they grab the last sucker, wait till they tag everything (or try to >_>) top off with a cure or two, slap DS'ed regen on, Asylum for the long haul, Holy (minus if bees...) + Aero III, etc and if I have the mind for it, re-apply DS'd regen right before DS runs out - so that boosted regen lasts a few seconds longer in the mass mob... and then begin wrecking things/stance dancing (depending on the tank). I'm sure there's a fair bit of overheal there from HoTs alone - especially towards the end if the DPS is faster to down some of the mob than what I'm used to - and if the tank is actually using cooldowns/geared properly... but it allows me to help DPS while not having to worry too much (that's not going to fix all/make tank immune for those mobs, though)

I also find if I get psyched out somewhere in the run, I'll start overhealing a little.... New to trial/dungeon, extremely rusty at a trial/dungeon, not used to being over geared for content and my brain is still very "wait, what? <_> so easy?" (MS 8 mans....), paper tank, a wipe was done, some mistakes were made, my own mistakes were made (such as getting caught with my pants down ala Cleric when a heal was suddenly badly needed and having an 'ohshit' moment) --- in which I then get a bit conservative on the DPS for a while... etc

However, when I see healers cure spamming because a hit or two took a smidgeon of HP, non-stop, I have to cringe.... that's really overhealing....
I usually wait for 75%-ish (sometimes I miss and heal sooner... because -->) with expectations of the HP bar getting lower before I can heal it (because by the time cure/cure II is cast, it would be below that - 65-50%, depending on mob).