I am absolutely certain that the strike will be over by October. The two sides are so close it is ridiculous. If it persists, I would get a paper ticket in advance -- you still have loads of time. It is one reason that I don't like e-tickets. I have been stuck due to mechanical problems when there was a flight on another airline departing but not enough time to get ticket reissued (e-tickets don't work for other than the issuing airline).