Would there be a challenge for any of the listed airlines? Or 1 or 2 years hold without any effort?
Quickly clicking through TP seems to be the easiest. One year without effort.
How long do I get status until?
If your application is approved, you will receive the corresponding frequent flyer status in the TAP Miles & Go programme within 7 business days, valid for minimum of 12 (twelve) months from the date of Approval.
You will receive a further year extension if you meet the following requirements, either:
a) Silver: Complete 2 flight segments with TAP Air Portugal AND 10.000 status miles starting on the day status was granted
b) Gold: Complete 6 flight segments with TAP Air Portugal AND 20.000 status miles starting on the day status was granted