Although I've never had much luck with Ebonite, I was paired up with a lefty for a big scratch tournament last month. The outsides had much more oil than we usually see. She used the V2 strong when the shot was fresh. Very good looking ball in her hands. It still had medium length (not a roll at your toes like the Icon300, nor a "length" oil ball like the Phenom) and a very strong continuous roll.
If you want to stay with Columbia, you can consider the Throttle (not the Throttle-R which is a shiny resin ball), or maybe the WOW or the Icon300 depending on the hook shape you want. Columbia also manufactures Track, so you have several good choices there as well (Freak, SuperFreak, Mutant, Phenom...).
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Penn State Proud