I have to admit I havent researched this, but still if any of the master planners here are willing to enlighten me a bit, I would be grateful^

Currently I have (earned!) one world top status (AA executive platinum) exp feb 2011 and star alliance top status (BMI gold) exp mid march 2011.

Until these expire I will have little activity on the accounts. Im not sure if this is a factor in addition to the status when matching.

I fly very little revenue, except the occasional intraeurope small hops.
I dont really care about OW status, will just trade my evips, and use the status for match.

Im interested in keeping *A gold for as long as possible. Main advantages are the biz treatment on the short Y flights, + extra luggage on longhaul.

Obviously I would want to match as late as possible. My AA exp would soft land to platinum from march, so if that one would match me to *A gold after june 2011, valid out 2012, might be best. But some airlines (like BMI) dont use calendar year so maybe matching in february still being AA exp.
And some give status for 2 full years (LH?).

Reason for my change in flying pattern is 2 million cheap US miles to be redeemed in F and C

Any strategy help appreciated. If I can match to different *A gold for the next say 5 years, then I could try to maintain my AA plat for this purpose.