Early game · first 8 minutes
Send Scrap Grenade across Solomon's firing position while avoiding the bishop's marked diagonals. Follow Rat Swarm with gunfire when he has spent a dash, and stop the chase if his barrier lets him reach safe cover.
Rat King vs Solomon
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Mid game · Walkers
Use Royal Pestments before Solomon and his teammates start shooting you, then advance from a side his bishops are not covering. Keep avoiding the pieces' Spirit damage; bullet reflection does not protect you from it.
Late game · Patron
Advance with Rule, Ratannia! while keeping space between allies. Slam your banner down where it can disrupt enemies and help your team fight, then leave the queen's marked attacks instead of grouping inside them.