ATTACKING FROM MOUNT
Sit high on his chest with knees under his shoulders or tight to the armpits
Heels tight to his hips or body with shoelaces on the mat
If he pushes your knee, turn your body to sit in a perpendicular lunge on his hips - keep the heel of the posted foot tight to his hip
Long mount - cross your feet behind his hips and hands on mat far above his head, push hips into him to counter the upa.
COUNTERING MOUNT
Frame against the hips with the forearm to create space to shrimp
Control an arm and break his posture to bridge
Elbows close to your core and force his knees close to your hips to get on your side.
You want to get your hips towards yourself so you limit or take away his inside channel control.