Lots of good advice there.
OK, given that background, twilly, why not go up onto the Lewis tops? Lots of possibilities (always assuming decent weather).
An out-and-back if the weather window is short. A partial loop from Lewis Pass, through Brass Monkey biv, and out via either Rough Ck track or Lucretia & Nina huts.
Near 3-Tarns pass, there are a couple of tarns S and SE of Gloriana Peak that are worthwhile goals. Not simple topology, you'd need to concentrate on navigation. Or perhaps (from Lewis Pass) a traverse through Zampa to SH 1662, 1687, 1692, 1681 then drop down to Ada Pass Hut (+ side trip up to 3-Tarns?) and out via Cannibal Gorge Hut.