(1) What is your home airport? BER and BOS
(2) What types of fares do you usually buy? Y, international, cheapest available.
(3) How many miles do you usually fly each year? 65K
(4) Do you have any kind of status at present? No
(5) What is most important to you in a FFP? Award redemption, specifically on the BER-BOS route. I have a fixed number of flights per year and am looking to minimize their total cost over time.
(6) Which routes do you fly most often? BER-BOS
(7) Preferred Airlines: None
(8) Do you travel for work or pleasure? Neither. Commute between two homes.

Here's my problem: UA has no fuel surcharge and low status level requirements, but doesn't let you earn miles for many of the cheap flights, e.g., LH economy. LH lets you earn M&M miles on such flights, but they're worth much less to me due to the fuel surcharge. Which program will let me maximize (savings from miles) - (cost of earning miles)?

Thanks in advance.