Disclaimer: I did not obtain this information by actually owning all of the weapons and trading them to Oboro. The information may be inaccurate. However, it is correct to the best of my knowledge/understanding and almost definitely reflects the actual capped potency augments.
Relic: https://imgur.com/a/UbXDqUK
Mythic: https://imgur.com/a/VRfBQVf
Empyrean: https://imgur.com/a/HvKxgGv
Aeonic: https://imgur.com/a/ZcWuOgf
The process was annoying and took time so I apologize for the format.