Originally Posted by GodLea

They occasionally dish out raw peronamin, so there's no point in getting a load and wasting them if I won't be able to finish anyway.

If you are talking about pink keys, then keep them. And keep your pero so you can buy n gacha tickets for the next gambit event. If you have more than 1000 pink keys, the one focus enemy will only drop cases. It does take ~1.500.000 pero to get the 1000 keys, but it is better in the long run.