I had the chance to consult with Tukufu about this subject earlier today and this is what I got out of him...
Well the authority most often quoted concerning the Divine "Gifts" that were granted by the Pantheon of Man would have to be Malomomen of the Emerald Society. In the first volume of his masterpiece "
The Pinnacle of Achievement and Subsequent Fall" he lists seven of them...
Illir's Throne of Man, Saluwe's Tree of Serenity, Altheres' gift of a common language, Anshar's Gates, Beltine's Well of Souls, Lariisa's Labyrinth of Time, & Yarris' Pearls
Beyond this I would feel fairly confident assuming that the Pillar's of Nier represent His gift to mankind.
Beyond that we move into a speculative realm. More controversially one might suspect that the Gift of Sarish is tutelage in Arcane magic. Though I suspect many conservatives in the Church would disapprove, it's important to remember that in the First Imperium arcane magic was celebrated. Imperial Sorcerers were though of as colleagues to the Imperial Priests. Our modern attitude do not match those of antiquity on this topic. So maybe. I know of nothing else that would fit on this front. Finally I note that the val'Tensen's heirloom
The Lion of Winter vies with
Kelisar to be the most famed sword in the known world. And its origin & mysterious "selection" of the head of the family at least suggests to me that it *may* be Hurrian's gift.
I am sorry to say I have no real knowledge to offer regarding the Gifts that were left to us by Cadic & Neroth. The search continues!
That's most of them! See also page 121 of the 5E Blessed lands Book.