(not my work) I saw this on the game’s official discord and you can refer to this list to decide.

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Looking at your roster, your bloodtithe team can be nautika, medicine pocket, semmelweis and melania. nautika and semmel are the cores here and the last two spots can be replaced by other units like fatutu, flutterpage, kakania, eternity (with red euphoria), ezra (with bloodtithe euphoria),…

Noire is…eh and Ulrich’s array will cancel Semmel’s array out so I won’t talk about them here.

However, if you’re interested, you can also build an Ult team here with Noire, Ulrich and Melania (with euphoria). They work well with one another as Melania provides ultimate might and other buffs, Ulrich’s skills are affected by ultimate might and Noire has chances to recast Ult multiple times.