Amsteel to Nylon double braid splice

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I have been considering making up an experimental composite dockline with an amsteel leaded coming from the cleat to just off the boat, spliced onto a double braided nylon line for the leingth of the line.

My though is that this would eliminate elongation at the high chaff areas (around the chock, and cleat), but preserve the elasticity of the nylon for shock loading and to allow for rising water during a hurricane.

My only concern is that I haven't seen a splice that addresses this (class 2 to class 1 end for end splice), and I am curious if anyone is familure with one, or has some ideas about how to perform it?