>>535243176
I'd recommend getting the costumes, the Lore (though you might only be able to get that from beating the story which you didn't do if you didn't get Yarandoo) and the Fous. Otherwise everything else is farmable or obtainable other ways.

> I already bought the summoning tickets.
Do you mean the Mana Prism shop for this? If so, after getting the tickets, consider Code Openers (required to make it so your servants can use command codes) and Fous. The EXP is helpful but the least valuable. Otherwise try to get bond-gain focused CEs, as gaining bond is valuable.

>Rare Prism exchange
For the most part RP gain is fairly limited so I would say determine how much each thing is valuable to you over time. The only one I'd say you should really consider if you're unsure is the Chaldean Visionary Flames - as they let you over-bond past Bond 10 and doing so grants big SQ rewards.

>>535243042
Water/Fairy