Just a random thought on WHM Asylum

[KDSilver]

Let's admit Asylum works as your suggesting :

Then if I want to use Asylum with that effects, that means I want my party to get that strong heal, right now, not "when they want to eventually pass through it"
In raid situation sure, that could be great (with a static or smart pug group), but otherwise on any other content, that would be frustrating, because of that brd wandering around in the arena avoiding your heal as much as possible.
Besides, that pretty much be a mimic earthly star but with a worst effect. I'm explaining : You have 20s to denotate earthly star, while your idea would be to let the player get the heal once they entered the field. Which also mean that if I want to prepare it for another mechanic, I'd also have to be sure no one will enter it before (or bad tick could trick us as well)
Something isn't working with that.
I know detonating ground healing aoe exists in other MMO, but it looks like it wouldn't work so well in FFXIV.