Prisma event CEs worth buying from the shop?

I skipped them. Have one MLB Ruby but did not get an MLB Sapphire. They are now in my second archive along with other useless prior event CEs. I have far too many good CEs. :)

When I have cost concerns, I equip MLB Jeweled Sword. That is a useful 3-star. Sets starting NP to 40% and NP gain to 10%. If I have enough cost to equip a 4-star, I have much better options.

Depends on your collection but they are fairly decent 4* CEs once MLB being essential a non MLB Angels Song and verdent sound/projection in one.