Based in ZRH and usually travel 6-8x C class long-haul to Asia, mainly to Greater China regions like TPE/HKG/SIN/PEK/PVG etc. I am Staralliance Gold (LH and SQ) as well CX Silver. Wasn't quite sure which program I should join to maximize the outcome.

It might help if some of the Chinese or Taiwanese carriers are member of the program, or I could earn miles on some non-alliance members like MH, EK or VS (earning already through SQ).

Any suggestion? A easy-earned status is also very welcome!

Since you don't intend to travel to America, how about Flying Blue? I believe you can earn and burn Award miles on MH.

One suggestion would be Delta Air Lines Skymiles, but since they're in bankruptcy I don't know if it's such a good idea to accrue miles there. They do have some advantages for you though:

China Southern and China Airlines (Taiwan) are members of the FFP, you can earn miles on both airlines. Not for status though. I believe that non-status miles can also be earned on Malaysia Airlines.

Continental has EVA Air as a partner, but their program is sh!t.

If you're looking for easy status, check out Alitalia, they are very generous with the number of miles they give an short segments and have very reasonable redemption levels. Alitalia says MilleMiglia is "molto piu generoso", and this claim is not without merit.

I've heard Flying Blue is not bad if you tend to fly higher fare tickets. If you fly low fare tickets, the program loses a bit of its appeal because of 25% mileage credit for flights and things like that.

For easy status I would recommend FB, 40k EQMs is gold = lounge access on Skyteam worldwide. MH is a partner and might even join ST in the future. With C-class you only earn 150% EQMs, some programs will give you 200%, that is the downside.

For starters, it's incredibly hard to redeem CO miles on CO metal, from what I heard.