Yes... I need that SSR weapon
But Jack O'Lantern offers 45% dark attack up, 5% more than Trivia, if it's not a character dark attack up. I don't know how much of a difference it will make but she would be a good option.
You need 3000 orbs to get one MLB Raid Eido from Eido shop or not?
So basically you need 4 MLB Event eidos to get Jack O'Lantern.