You may want to wait even a few seconds before proceeding with a climbout. After the climbout, it's time to exit. This is the greatest variable and most unpredictable variable in all of spotting. Use your best judgement to guess how long a climbout will take. Less experienced jumpers tend to take a longer time to climbout, but not always.
Seasoned jumpers can be speedy, average or slow-pokes.
The exit follows the climbout, regardless of how long the climbout took. A good exit point really depends on your guess on how long the climbout takes. You should get a good idea from that. A great spot is when you know before taking off, your three landmarks for cut, climbout and exit, and approximately how long the climbout will take. You must use hand or light signals for accurate communication with your pilot.