So, I have put some more thought into it. And I think it all centers around progression and customization.

Example:

Vision
Default: Gods can see pretty well up to the horizon line, like an eagle.
Monument: The hall of visions allow its master to peer into any location
Relic: the silver crystal ball is used for scrying
Ability: This god can remove his eyes and send them to spy on others.
Portfolio: The god of chickens can see what a chicken sees

In general they should be less powerful than relics and structures on the ground of being personal, whole relics and sites can be stolen.

Though this made think about ability x portfolio. Ports obviously should come with ease of access to things related to it. An ability is more of a body trait, magical powers and skills outside of their domain. (Example, a god unrelated to music being able to play mesmerizing beyond masterful songs is an ability).

But then maybe extreme takes on their own portfolio could also be abilities. So god of chicken being able to see from the eyes of all chickens, all the time, at the same time.