Miles and More (LH,LX,OS,LO etc) might be the best option out of ZRH/BSL. LX covers several Asian destinations directly from ZRH while LH's main hubs MUC and FRA (and OS in VIE) are just a short hop away. M&M offers in C 200% status and award miles on all *A carriers plus 25% on LH,LX,OS...
With 2 rt monthly to Asia you will soon reach HON circle status (600k status miles on LH,LX,OS...within 2years) which gives you a real first class treatment.