The Perpetual Mechanical Array drops both Prithiva Topaz and Shivada Jade, so you may not have to fight another boss to get enough Shivada Jade for Ayaka.

It is very easy to find where the Genshin Impact Experimental Field Generator Prototype Cal. Breguet is and beat it.

For more Genshin, read our guides covering all the current redemption codes and the best builds for Furina, the Hydro Archon herself. Now, on to Ayaka Talent and Ascension Materials in Genshin Impact.