well this all depends on what you consider light oil. track rule is a heavy oil ball, so it doesn't take much to get a much weaker ball than that. Personally I'm using a Wild for when my other stuff isn't working right. thats after a Wired and a X-factor deuce. the ball is drilled weird so it actually rolls up soon for a polished ball and breaks into a roll. ive got a Slate Blue Gargoyle comming for when the lanes are completely toasted (polished Urethane). I'm not sure how much the Hammer Sharp Blade is supposed to hook so
I can't really tell you your ideal ball but, assuming its just a step down from the rule, i would think that maybe a messinger of some type or one of the weaker flipside balls. thats just a guess. anyway, hope this helps in your decision.
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Conversation between me and my girlfriend.
Her(what I hear):Blah blah blah blah blah BOWLING blah blah.
Me: What did you say about bowling?
Her: I didn't say bowling I said, DRIVING, I'm tired of driving.
Me: Ohhh. Nevermind.