Mount the size 14 2X-long nymph hook and start fluorescent fire orange thread behind the eye, running a base back to the bend.
Pull an inch of the softer, webbier golden olive marabou from a blood quill plume and tie it in at the bend as a tail one shank length long; it should be sparse enough to breathe in the water.
Tie in a length of small copper wire at the bend for the rib and bind it forward along the near side of the shank.
Blend the three dubbings together (a cheap coffee grinder works) and spin a fine noodle onto the thread.
Dub the body from the back of the hook forward, building a slight taper toward the front, and stop a couple of eye lengths short of the eye.
Rib forward with about five open turns of copper wire, tie off behind the head and cut the wire on the inside of the scissor blades so you do not dull them.
Pick out the dubbing with a bodkin or brush to make the body buggy.
Strip the webby base from a partridge feather, tie it in by the tip behind the eye, then fold the fibers back with hackle pliers and take two or three open turns for a soft collar, stroking the fibers rearward as you go.
Tie off the hackle, trim, and build a neat fluorescent orange head, then whip finish.
Add a small drop of thin UV resin over the head, letting a touch run into the hackle base to help hold the fibers back, and cure it.