Best advice for parasailing, use parasailing gear it is less likely to fail and break. Kite gear is too unreliable and prone to breakage under the major forces during towing. Towing creates peak loads in all the gear akin to that generated in the seconds of launching a jump. During towing these stresses last for the entire time of the tow.
Stalling the kite is fairly easy too. Say you suddenly come off tow, let go, have control input errors for a second, down you go. Pulling to near the zenith puts you particularly at risk, the forces and tendency to stall are maximized. If you let go or are let go in this position, it is probable that the kite will go into a stall that you may not recover from. This can happen with paragliders on tow too and paragliders are built to handle these sort of stresses. Still, if paragliders stall badly enough, down they go. Paragliders and hang gliders that tow up use winches with variable tension control, weak links, tow bridles, radio comm. with pilot, driver and winch operator. It is a different approach and built upon years of hard experience with alternate approaches. Ballistic parachutes are of no help in this as they need at least about 450 ft. of altitude to have time to deploy.
What can break? Lines, pigtails, harnesses, spreader bars, leader lines, bridles, chickenloops, kites, etc. have all failed many times under much lighter loads while kitesurfing. I have had at least 25 failures of this stuff in over seven years.
More about this at:
http://fksa.org/viewtopic.php?t=2087
It's all about choices. Good luck