Early game · first 8 minutes
Take cover between trades so Serrated Knives cannot keep refreshing the bleed. Save a dash to move sideways out of Slice and Dice.
Rat King vs Shiv
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Mid game · Walkers
Send rats after Shiv uses Slice and Dice, then shoot while backing away. Use healing reduction if his recovery keeps undoing your damage.
Late game · Patron
Slam your banner down when Shiv approaches a low-health teammate. Spread out so Slice and Dice cannot hit several allies and shorten its cooldown.