Is there a way of unlocking a 6*'s equipment slots, other than hoping that you ever pull the same FKG? I know that Life Crystals can be spent on generic Skill Blooms, just wondering if there was anything similar for equipments that I've been missing.

I figured that for a 6* character it might not matter, since most people would throw all their Ampys at 'em (maybe?), but I wanted to double check. Thanks!