Talk:Prisma Causeway Event/@comment-4802891-20160907100151/@comment-29893250-20160907134205

It depends on how big your want list is and how high they are up on them. If they're not high up and in a sort of want, then don't roll. If they are, then there's 2 priority servants rated up and you should. Unlocking them in story gacha only rarely makes a difference (though it does make a difference) because the best times to roll are limited and events and when something at the absolute top of your priority list has a rate up, even better if there are 2. Basically, limited events have stuff you can't get anywhere else so there's typically more value in rolling then. Say you want Medb. You can get her any time. She's not going anywhere. Unfortunately, she's story locked which means she's not in limited gacha unless she's rated up so this makes it a bit tougher. However, you can simply wait till a time that the two coincide or whatever if you're patient. Like in the DaVinci event E Pluribus day, she was rated up along with DaVinci and all the servants from America. Anyway, if these are in your top 3 or whatever most desired servants, go for it. It is your best chance. But otherwise, it is really a question if you want Illya or not.