Sharks typically have 3 rows of teeth, so is it easier to break the tippet & let the shark have the fly or risk a bite retrieveing the hook ? #10 works on the 3'-5' black fins in the harbor, but for the big 8' + bull & lemon sharks a #14 might be less likely to break since that's getting up towards 1000 lbs. #12 weights are cast for the 200 lb or less tarpon in the harbor. Save the #10 for the stripers, roosterfish, etc.