The jib reaching technique I've come to like is this:

Driver sitting on the hull, far aft at rear beam, traveler line in hand.

Crew on the wire, chicken line attached, in downwind position in footstrap, mainsheet in hand.

Make sure the jib is eased plenty.

Driver plays the traveler and crew plays the mainsheet. Its probably not as fast as twin wire but a lot safer.

The other important thing to know is whether its up or down for the "escape", i.e. is it closer to sail upwind to depower or downwind to depower. When jib reaching its important to know this and for both driver and crew to know which way the driver is going to turn in a last ditch effort to depower if the boat really loads up. Usually we just say "up escape" or "down escape". And if it gets really bad, turn up hard and let everything go, cause if you're eased out a lot already, a "down escape" will still be pretty powered up (as others have mentioned) and you won't be able to keep the bows above the water.