The rift keys are a low random drop chance from rares/treasures in Korthia, and you can buy them at rank 4. For the most part, not a lot of people are doing them anyway, so you’re not really missing out on anything or behind the majority of the player base.
no i have heard you can always go in the RIFT after , if you do the jailer treasure , you will loot a rift stone ( all your group can go in the RIFT without using keys ) , and everybody loot it , so you are fine after .
i don’t know i feel behind , i’m only tier 3 , apparently , everything in the RIFT give insane relics and it’s the priority in Korthia