Not sure whether this is a good global solution, but I've had success with the American Wire Co. braided wire for bluefish. It comes in a range of strengths (diameters) and most can be tied effectively (if careful). I like the intermediate diam/strengths because they are stout wire, yet not too stout to prevent tying into knots. The joint between leader and wire is a surgeon's knot, and there is debate on the terminal knot to the fly. Clinch and figure 8 cover me pretty well.
Most likely the damage incurred by one gnarly toothed beast is enough to warrant replacement - but at least you will still have the fly and have a shot at landing the fish.
(BTW - nice description of the tarpon shock leader)