My take on this. If you are committed to using the 10.0 sail for your 8-14 knot sailing, it will work best on either the formula or hypersonic. It's too big for the iSonic, especially with your weight and size. The 10.0 is even a little larger than necessary for a 66kg sailor on the two big boards, but it will keep you going in the lulls and should give you an exciting ride if you are reaching most of the time.
I have a F160 and an iS111 and the two work well for me without a gap for freeriding. I weight 77kg. I use my 11.0 and 9.2 on the formula (8-15) knots and then 8.4, 7.6 and 6.6 on the iSonic (12-20 knots). All Maui Sails TR race sails.
My recommendation is the ultrasonic although I have never sailed one.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.