Quote Originally Posted by Unregistered View Post
I have enough materials after MLBing the Rahab weapon, getting all gatcha tickets, getting the first set of SoulP, getting 3 black grimoires and a gold one (grimoires are really expensive!), and all 20 half elixirs to grab one copy of the Rahab eidolon. I was told that there will be some kind of eidolon exchange store so should I get one for exchange purposes in the future?
Always get at least one copy of the eido for lewds/jewels.
Other than that? You can get more copies if you need or can afford it, but it's a luxury. Don't go out of your way to get more copies of an eidolon you aren't going to use.