MLB Chaldea Lunchtime

That would be entirely up to you. The difference is 2% versus 10%. The effect stacks so a lot of us like to use a support copy and our own copy when farming.

I personally would say that you should either have 1 copy or 5 to MLB it. If you don't think you can get 4 more copies of it then there is no reason to buy the second copy.

I say you should farm it. There are lots of events coming up with prisms and you could just keep burning your 3 stars. The item will be there for about 2 more months so you have some time.

You can *live* without having Chaldea Lunchtime at all. However, it would be nice to have a MLB copy, not only for your own use, but also because it will increase the chances that someone will want to use your servants as a support.

But don't buy a second copy yet. Just save your mana prisms until you have 4,000 and then buy the remaining copies all at once. That way, if you don't wind up getting enough mana prisms in time, you won't be so screwed. It would be a shame to wind up buying 4 copies, and not being able to afford the 5th.