Not sure if this helps, ignore if it doesn't.
I've done a height profile of almost the route you've marked, just staying high on the ridge down to West Kiewa Logging track instead of crossing creek.
There appears to be a track on the getlost map I have on the next spur to the south on the Fainters side, which you can see on the map.
A KM+ climb from the road up to Feathertop summit in about 2500m. Hard work in scrub.

- Fainter-Feathertop