Quote Originally Posted by Fendred View Post
They might want to save up ahead of time, like when they are still getting the atma crystals. Or they may have all the atma crystals, don't know exactly which weapon they want to commit to, and still want to make progress towards whatever animus they are aiming for.
This. I can definitely see a case where someone wants to focus on their relic starting from the Atma phase. While grinding out Atma, save up your myth for books (and subsequent Alex maps) so that when your Atma is done, you are ready to go on the next phase. The OPs suggestion is a good one.