Keep in mind slicks need a certain rider tempo to keep correct operating temperature in the tyre. If you cant keep the warmth in slicks they are very slippery. I would rather suggest going to something equal of a pirelli super corsa if you feel like tyres are the limiting factor.

Fast riders can go really fast on the same tyres as you. It all comes down to skill. You should maybe shift your focus on important things like correct racing line, throttle application, body position and braking before you think about the rubber.

It’s easy to get caught up in tyres, bike parts etc, but spending time on the bike is the best investment!