Hi, I'm from Hong Kong and I bought a pair of Leaderfins Ice in Medium stiffness with their own f/p for scuba diving and found them way too soft compared to my pair of Sporasub thermoplastic fins that I started with. I would like to change to stiffer Leaderfin blades and wondering if I should go for HARD or EXHARD for scuba. I know carbon would be out of the question as they'll break too easily for scuba so I should go with fiberglass... even that can break too. I'm a female, 128 lbs. with strong legs. Thanks for any input!