What if Spinal’s curse’s decrease to the point that he can’t prevent your Instinct from ever activating like he does currently with Ultra-Safe 50/50s so eventually you’ll still get Instinct no matter how many times you get hit with a S.Skull. Even better solution is Once you Have Instinct Activation available Spinal can no longer remove that from you. While it’s building he can make it take longer to build, but once it’s there for you to activate he can no longer take that from you, it’s yours until you actually activate it.
However his Teleport BS might grow in wildness, like he can stab his sword through a portal and strike you Quan-Chi style; Or he can Teleport from the ground and reappear in the air to follow up with a Dive Kick or a really unsafe but hilariously tricky Air S.Teleport. That would be interesting.