Quoted from Spybryon:

Go for multiball immediately after ball launch when ball saver is still turned on. Either you are shooting for the center target on the time expander to light the lock, or you are shooting the saucers. Once the ball saver expires, shoot the left orbit to do video modes (which is a relatively safe shot).
If you manage to start multiball, let the two balls that are kicked out of the saucer drain. These you will get back since the ball save is still active. Next, the first ball launched, shoot the H then shoot the O loops till you get your playfield mutltiplier up. Now you will be playing for 180million to complete the time expander instead of 35million.