In reply to ams558:
It’s possible to go for Mt Aspiring SW ridge (class route) in 3 days - 1 up to French Ridge hut but keep going onto Bonar glacier and bivvy below route 2 climb SW ridge and descend back to French ridge hut (via NW ridge iirc) 3 back out to Raspberry flats.
Sharks tooth also in the Aspiring area 1 day up n down.
other options, Mt Brewster 2 day (small hut up there)
re: the Darrens, gets alot of rain! days/weeks at a time - fine If you’ve got plenty of spare time to wait it out