The new addon smelts down base Aether Valkyrie tools and armor in a furnace to make Valkyrum ingots. I think for compatibility with this mod the recipes can be switched to use Valkyrum items instead or disable the recipes and use this mod's Valkyrum ingots in place of the addon's Valkyrum ingots.

I am already aware of the add-on though it's not a high priority at the moment for and I'm not yet 100% sure on how I will handle it but I'm most likely gonna disable the Treasure Reforging Ingot and make Ancient Aether's Valkyrum more similar to obtained when installed. I don't see a reason to enable the Treasure Reforging Ingot since it's only used to craft a block so I'm most likely change the blocks texture to use AA Valkyrum Colors and have ot be craftable in a 2x2 grid.