oshi no ko weiss schwarz booster box Pack 【OSHI KO】 Vol.2 | Products Yurie Igoma (as Ruby) Weiss Schwarz: Trial Deck: OSHI

This seems very OP because a 1 card combo is of course easier to assemble than 2-or-more card combos, and besides being easy to assemble I think it improves your resilience because it's easy to recur or topdeck a single card, and initial card investment is lower so you have more potential space in hand for interaction or a backup plan

SS) By Published: Description Usagi Tsukino, a.k.a

That's a level of strength you might miss until you start playing with the card

The other possibility would be a deck like Baral Gifts Storm

Maybe you dont have 7,000 cards that need storing, in which case there are also smaller versions available, such as a single row storage box