The SA. #9 Bone fish taper is a great bone fish line. I think your buddy should use the guides rig for tarpon(have you heard this befor?) and use the #9 for any of the smaller flats fish.
The clear sink tips are all the rage, but are difficult to pick up quickly, so the first one has to count."...till you see the whites of their eyes..".
I will be heading down to the Keys in two weeks. I've been practicing like I'm on my way to Carnagie Hall( not for the spelling bee). Eddie