From the period of 2015-2020 I'll be flying form New York to Saxony (specifically Leipzig). I have 2 options: UA/LH/AC and AA/BA/AB. I'm leaning towards oneworld because it has more options even though it's more slightly expensive.
In this time frame I'll be living 1/2 in Germany and 1/2 in the US. I'll be flying at least 3 transatlantic a year and 5 CONUS, Mostly on Y.
So of the two options which has the better mileage accrual and the best CC?