Early game · first 8 minutes
Use Gloom Bombs to force Rat King away from the wave. Follow with Leaping Slash after Royal Pestments ends, and keep a dash for the rats he sends back.
Calico vs Rat King
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Mid game · Walkers
Use Ava to approach from the side, then leave with stamina dashes if rats attach. Their damage can keep resetting Ava’s movement-speed bonus.
Late game · Patron
Use Return to Shadows when Rat King and his teammates turn their attacks on you. Move out of the banner’s area before you reappear, then attack again once Royal Pestments ends.