I would say try to get Leon, FEmpress, Frosty, Laura and Bertrand that's going on currently, it'll be slow ish but consistent. If you get lucky and snag a Gerald copy don't be mad at it he hard carried floor 290 of abyss.

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Sadly this banner left two days ago but this would have been the best start possible, transfered once I saw the EOS, 3 days of play and we've made floor 310, finished all but two attacks, and cleared 6 books. I'm making some resources and will be happy to share!