LX has been banned by Libyan authorities after a "diplomatic" argument between Libya and Switzerland has been going on during the last few months.

This leaves the following *A options out of TIP:
- TK to IST
- LH to FRA
- OS to VIE
- MS to CAI

Both LH and OS have Miles&More as FFP. I believe M&M to be quite good if you fly in C or F, but poor for an economy passenger. Reaching status (SEN) when traveling economy is almost impossible, unless you are able to collect 100K status miles per year (European flights get only a fixed amount of miles, regardless of the distance flown, which can amount from as low as 125 miles up to 1250 in flexible economy).

My suggestion would be: M&M if you fly business/first or otherwise United's Mileage Plus if you fly economy (get more miles in more booking classes than with M&M, pay less fees on awards, may have free access to E+ on UA flights once you reach status with UA, reach Premier Executive status = *Gold with only 50k elite qualifying miles). A good option for status is also BD, but they are being bought by LH and I expect them to be part of M&M sooner or later (probably sooner).