If you fly into Chalten solo and start looking for partners, you are gambling big. You don't want to be working out the kinks of a faulty partnership with some Polish dude you just met 20 pitches up a routes.
Trust me...
Nepals are probably overkill for routes in the Torre Valley, but for mountain routes like the Whillans on Poincenot, they would be the ticket. I'd bring some Trangos for Torre Valley stuff, and for a lot of the short stuff like Guillamet Mermoz etc.