Hey Slicepong,
Great question. If you are against very heavy backspin then you want to start your bat lower to the ball and brush upwards, but most importantly you need to make use of your legs and body. This means when you brush upwards you will go forward at the same time when you’re using your legs. When you are facing a topspin ball you want to start your bat higher on the back swing and go more through the ball, with a more closed bat angle.
You are right indeed here Slicepong. This video highlights specifically the situation you are talking about Hope it helps: https://tabletennisdailyacademy.com/videos/fifth-ball-attack/
Answer for changing-topspin-forehand-form-on-topspin-and-backspin
