This tip for playing the Eternal Life wizard mode comes from Gary Hoh:
One more quick tip: When you finally complete all modes, the idea is to hit all the switches and get one billion points during multiball. The best thing to do is go for the Path of Adventure switches first because you have 30 seconds of "eternal life," and you can concentrate on the PoA without worrying about losing the other balls. Also, the "wizard mode" continues as long as you have at least two balls in play (with L-7 ROMs, at least). So even when your "eternal life" mode is over, you still can collect one *BILLION* (in my Austin Powers voice) points if you finish the mode during "multiball."