You need to be very careful with your booking classes. Always check which booking class you are on, and maybe spend a bit more to get to a higher booking class. I just checked accrual for you between Turkish Miles&Smiles and Asiana Club, and Asiana Club comes out slightly ahead in terms of mileage by booking class. Since Asiana also allows two years to accumulate the flights, this is maybe a good programme for you as it will allow you to keep your status even in years where you fly less.

However Asiana Club is not such a good programme if you fly business or first class, or on short flights. Also, redemptions are not great. But to keep *G, perfect.