If the amas are removable but cannot be stored in the boat, this is your class. A CLC with Sail Rig to form a trimaran like Wango Tango is one example. Two EasyRider kayaks lashed together to form a catamaran is another. In theory, these boats should be faster than a class 2 boat. Due to the larger amas or the second hull of a cat, a larger sail rig can be used.
More sail means more power and higher boat speeds.
But then you encounter the shape of the hull or hulls. A kayak or canoe hull is not designed to be a high speed sail boat hull. The characteristics that make it a good kayak or canoe work against high speed sailing. Sail too fast and your kayak will become a submarine as your bow goes underwater. Don't get me wrong though.