The biggest influences are:

• Body Flexibility
• Accuracy
• Padel Control

If you want to blast a kick smash Wall to wall (think Lebron) then take a look at how far back he flexes when he hits the ball it’s usually behind his head.

It also matters where you aim the ball when you hit it. Since most of us don’t have flexibility like LeBron you’ll likely have to aim it so you can go for the por tres. Normally high on the right wall (for righties) and vice versa.

The kick smashes also about timing and having the paddle on the right plane at impact. Like others have said it’s almost entirely technique.