Hello everyone,

I have a question, I'm going to two different countries this summer for study abroad. However I'm currently OZ Gold equivalent to Star Alliance Silver and I'm 49k away from reaching OZ Diamond(*A G) level. I'm going to be taking flights from Boston-Zurich(Swiss) then JFK-Johannesburg(South Africa). Asiana unfortunately doesn't have flights to these areas from my origin so which airline is the best to take so I can reach the OZ Diamond status fastest? Thanks for your time and input.