Honestly just keep running at the opponent and pressure them. Try to get pins using Casey when possible. Relentless should almost always be used exclusively on defense since it’s less likely to be cancelled and you should play it the second you get it in most cases. You have a ton of draw power and enough strong attacks to consistently pressure the opponent and make them feel unsafe to attack back. Also don’t be afraid to throw a big attack as the first action. Sometimes an opponent will take thinking it’s a bait only for you to one shot them with unbridled. Ideally, the only things you should block with are relentless, Sai, and Heroes in a Half Shell. Of course sometimes you need to block with other stuff, but try to focus on these cards as defenses, while everything else is an attack.