Thanks MJD, definitely looks promising aiming down to the spur, I'm sure with time, good weather & a bit of luck we'll find a route down. Can't wait! I have done Olympus (North & South summits) as a weekend walk, camping at Lake Oenone (awesome spot) & also Othrys as a day walk (along the Cuvier Valley track, up & over & down to the Overland Track back to Cynthia Bay) - both very enjoyable walks.
My favourite in the area tho is the Cuvier - Manfred circuit: from Narcissus up to Byron Gap, most of the way up Byron (summit is one of my faves) sidle & drop down & head towards Cuvier along the long scrubby spur, summit Cuvier, drop down & camp in the saddle between Cuvier & Manfred (a little water from some small tarns), summit Manfred (a truly awesome peak), drop down to Manfred plateau (not at all scrubby on the plateau, a bit of route finding to get down to it) before dropping down to the buttongrass plains (similar descent as from Lake Oenone down to the Overland Track, ie. sandstone belts, open forest) & connecting with the Marion track back to Narcissus - pretty long 2 days (especially catching the ferry each way which shortens the days).
I'll let you know how the other mission goes, very much looking forward to getting away from work for a while. Thanks again for your beta.