Aeroplan is not really a good program if you fly paid business class.
Agree to go for M&M. You only need 35,000 status miles for FTL (1.5 roundtrips ANU-YYZ-ZRH in paid business), and this will get you lounge access at all airports with a LH, LX or OS lounge when you fly within Europe in economy class.
Senator status needs 100,000 status miles, but the 25% status bonus counts for status; and you only need to fly 100k miles every second year.
So, to get to *G with M&M flying ANU-YYZ-ZRH, you get to 36,900 miles (and hence FTL status) after 1.5 roundtrips. Then you need another 2.5 roundtrips to get to 106,000 miles (and hence SEN status). This is a total of 4 roundtrips from Antigua to Zurich in paid business class for *G.
To get to *G with Aeroplan, you probably need slightly less. I assume that the COS bonus count towards status. You earn 150% on ANU-YYZ, and 125% on YYZ-ZRH. You would need 2.5 round trips to earn *G. However, for redemptions, you accumulate much less miles than on M&M.
SmilingBoy.