Give Mangus, Mrhino, and Wrhino swap in headbutt to tone down their swap in damage. Dracos Savagery is about as balanced as it’s going to get, but they need to lose their cleansing impacts for cleansing strikes and be fully capable of being swap prevented.
If ALL swap ins need to be addressed, I would make it so that both players can see their opponents entire team at the start of a match, so you can know if they have a swap in dino (and which one) and you can plan your strategy around them instead of being blindsided by a massive SIA. In exchange, automatic swap abilities should let you choose which dino you swap to instead of having it automatically be the next dino to the right. That means your opponent doesn’t know for sure which dino you’ll swap to, and it makes swapping strategies less dependent on RNG as a whole.