Tbh I don't have much faith in this flash. What type of control of the speed force does he have? I believe WBH could brush off enough hits to achieve a thunderclap or stomp to the ground.
The greatest attack WBH tanked was colliding with Betty and tanking a force beyond a billion planet destructions. In other words, Barry would need to hit WBH with more than a billion times the force capable of destroying a planet.
But what people don't understand about the IMP is that not only you are getting hit with a phucking planet or worst but you are getting hit with it at near the speed of light.