Bead the N01 with a 3mm gold tungsten and start the Sumo thread behind it, running back to the bend.
Tie in a short Coq de Leon pardo tail, about half a shank long, keeping it sparse so the barbs stay stiff and splayed.
Tie in a rusty brown goose biot by the tip and wrap it forward to the 65% mark with the notched edge trailing, so each turn leaves a hard rib. This is the whole point of the fly: a biot body is far more durable than the pheasant tail barbs it replaces, and it still gives you natural segmentation.
Dub a compact natural Mad Rabbit thorax over the front of the body, leaving room behind the bead.
Switch to hot orange Grip 10/0 and build a small hot spot collar directly behind the bead, then whip finish. Using a fine 10/0 thread here keeps the collar bright but tiny.
Fish it as a searching nymph anywhere you would fish a pheasant tail.