i've got a 10m and weigh about 75kgs. on a tona pop 138 with boots in flat water i'd say 17-18 knots to 27-28 knots roughly. torch's boost biggg but only in strong winds!
if the kite is dropping out of the sky (hindenburg) after a sent jump then you are not timing the jump correctly. All kites use different techniques to fly/jump. My ozone c4's will drop out of the sky if you don't get timing right. I still love them because i know how to fly them correctly. I'm sure...
We don't need every person who thinks "kiting looks cool" out on the water. Imagine how much traffic there would be if it was affordable to everyone. Kiting demands open space and i'm glad i'm not rubbing shoulders with every tom, dick and harry