Ive managed to work this kind of things with checks on "requisite" with health and morale. Based on units available in a stack.

But this might require else things. Are you sure you set it up properly?

Devout if I'm not mistaken is a property while it may work little bit different.

It's little bit schetchy to try to debug without seeing whats wrong.

I might give a go to find a solution if I know little bit more what you trying to achieve

Well you can check easily if you want, just use a [Unit Property-extra ability effect] redirecting to [Magic tactical- count property damage] file. That's just two files to setup + the hero skill file, then just put the skill at level one cost 0 skill point.
In the case of the Theocrat shrine unit, it seems that it does not cause any issue because the Count property damage effect is directly included into an active ability. In my case, it's a passive which is supposed to proc on any range/melee attack from the hero.

You checked this in debug mode aswell?

yes

You cannot change properties the way you think since dynamic data is dependable on Requisite skill and not on "extra ability effect". Im not sure its possible to really force it without a Ranged/Melee/Spell effect to ensure the "Magic - Tactical Unit Effect: Count Properties Damage" which depend on dynamic group data.

But a minor solution is if you want to make it as a passive:

Make copies of the
"Devout Requisite, Devout Dynamic Group, Devout Group Data, Devout Heretic Slayer Devout Icon" Name them whatever.


In the "Devout Heretic Slayer" in the property filter: Heretic Ability
replace this with either "Summoned Property or Magical Origin Property"

Add a hero updrage with the unit property "Devout Dynamic Group"

There you go. Hope it helps.