Honestly that Castle 2200 is a beast of a motor, and on 6S properly geared it is stupid power and speed.

There are a lot of good motors out there with their own strengths and low points. But if the issue is that the 2200 is not enough power I am not sure what to suggest that will give you a big wow.

What battery are you running?
What vehicle?
How is it geared?

Those are all relevant to how your vehicle will run in big ways.