Enhancement prisms are the hardest thing in the game to get right now. You can buy them from rahool at an absurd price or grind the portal endlessly. Ascendant shards are just common at this point. I have 30 ascendant shards and 0 enhancement prisms at all times for the most part. Can’t upgrade any armor because of it. Not even a vendor on Tharsis sells any. Just enhancement cores. BTW, If anyone has some secret/effective method for getting enhancement prisms I’d love you forever 🤣