This is a rather hypothetical question, but I feel it’s worth asking.
As of now I have a 4 star Executor. I also have a 4 star Wat. My current plan is to spend a large amount of hoarded crystals on the Executor event in order to get him to 5 star, maybe 6 star. Should at minimum be 7 star in 3 months or so with that plan. Without crystals… much longer.
However, there’s also the possibility of Wat shards appearing in the Weekly Shipments store in that time. (Other valuable shards too, but mostly just Wat.) At my current rate of Wat collection in my guild, I’d 7 star Wat in a year. Will probably speed up as more guildmates can complete the mission, but still a long time.
So, a hypothetical: would it be better to spend crystals on Executor shards or Wat shards?