I made this mod for myself and someone but still planned to post it here, it adds 3 sets of armors (and tools). If you wanna play it here is a few info :
The Demonic set and the angel set, both can be upgraded into a more powerful version, then combined to make the 3rd set of armor and tools which combines their powers.
You probably will need Roughly Enough Items and Roughly Enough Resources to craft and find all ores as they are found in all 3 dimensions in very different Y coordinates.
Right click on soul sand/soil with empty flask to get a Soul Flask.
Right click on the Erasium ore with a Purified Flask to make it breakable.
Kill Wither Skeletons with the Empowered Angel Sword to get "???".