As a personal fan of the Doom Slayer, I was excited to craft nether combat armor, and was sad to learn jei's way of crafting it was wrong, I don't know if it is craftable, but if it is please inform me - AstroMania28

It's not obtainable in survival yet. You can add a recipe with crafttweaker though if you want.

Thank you, you are very nice

Im in the same server with this player its a 2 person server