Avabob,
While using a direct line on heavy oil can work for many people, if the ball doesn't allow that, why not just use a milder ball, with an appropriate drilling & surface, that will alow you to play the lanes the way you prefer?
Meanwhile many of today's strongest balls (not the biggest hookers, but the ones that handle the most oil. They're not always the same.) will often allow you to swing the ball to a certain extent. Some of them, for those with good rev to ball speed ratios, will even be able to hook such balls in true heavy oil. Some of these balls are that strong.
I think one of the important aspects of this game is thatthere are many alternatives to playing lanes, based more on the skill set of the bowler and due to the very large versatility of the ball choices we have available to us right now.
Heck, there are even some old school particles, like the Lane Masters Dynamic Power and the Visionary Ogre Particle, will allow almost any bowler of lower revs play a heavy oil pattern.
If you wish to use a pearl reactive to do so, there are more choices than you shake a stick at, so to speak.
"None are so blind as those who will not see."