Alliance Crystals
Why do we even have them? I don't get it. They offer 3 & 4 star sig stones, boosts(which are plentiful from solo crystals), Iso(which is rarely 1 tier5). & 2,3 & 4 star Unstoppable Colossus. & What acts as a final nail in its coffin is that there is no variable of story progression.
What's your opinion on the relevance of these crystal in accordance to the current meta.