I just finished reading a new dissertation:  Ashby, Solange. “Calling Out to Isis: the Enduring Nubian Presence at Philae.” PhD diss., University of Chicago, 2016.

I found a few cultic references which I thought were interesting.

Some Nubian Altars to Her had:

1. a  horned altar–cow horns as she is a cow headed goddess
2. a palm branch–to symbolize life and renewal
3. Aset Emblem–sundisk encircling  cow horns
4. Pouring Libations–I’m assuming to the dead or to Wesir.
5. Some altars had snake iconography
6. Some altars had a three-petal flower emblem on  bowls
7. Within  Nubia and at Philae, Aset was honored with Wesir, Heru-sa-Aset (with a Nubian  place name epithet), Anubis and Nebet Het.  She was also honored  alongside some Nubian deities.  (pages 195-202; 206-207; 243-244; and 256-258)