Hitting of a tee and using parachute

You can use whatever you want. BUT, unless the swing is mechaically sound and you understand how bat speed happens and the difference between bat speed and a quick swing then no matter what you do it will NOT help.

It's not about drills if the swing mechanics are bad. Because you can do any drill the wrong way so the secret is to study and learn the swing and how POSTURE, CONNECTION and ROTATION work in the swing.

It is very difficult for most to consistantly use correct swing mechanics without a chute.

Throw a chute on a bad swing and you only compound the problem.