>90 synchro slots are not enough
Holy shit, surface mode need so many random nikkes to synchro once you build 5+ squads with good synergies. Between that, manu towers, pvp arena/champion, manu rankings and union raids, I've never needed as many sync slots as of right now. And why 3/4 nikkes that give move speed are fucking seasonal limited? Fucking Sneon and Cmika ffs.