I'll give my $.02
1. Just depends, but I think having a civilian cyber job would be beneficial as you're not legally bound by a commitment in most cases.
2. Again, it just depends... But you still have a commitment that you sign, so I wouldn't sign your life away for a cyber job in the AF if you want to fly jets.
3. Just study all the form S books, but focus on Math Knowledge, Table Reading, Instrument Comprehension, and Aviation Information. Those are the only 4 that count towards the pilot score on the new T version (Arithmetic Reasoning is no longer factored into the pilot score). Make sure you know the new reduced time for Instrument Comprehension (5 minutes instead of 6), and study accordingly. https://access.afpc.af.mil/pcsmdmz/Form T.HTML Use this site in addition to any and all form S study guides. PRO TIP: The book with the F-15 on the cover is excellent.
4. 69 is definitely the best number, but that has nothing to do with the TBAS. On a serious note, even if there was such a thing as a "magic number" (which I'm pretty sure was just misinterpretation), nobody on here would be able to tell you what it is since it violates the test rules (think Fight Club). For most people to get scores in the 90's, you need to be in the 100-200 or 201+ hours column. PCSM 2.0 is highly focused on flight hours, so don't get discouraged if your score looks crappy with 40-60 hours.
5. Unsponsored is only AFRES I believe. I honestly don't have a correct answer, but I think last I heard it was twice a year: once shortly after the new fiscal year, and once in the beginning of the summer.
6. I'm not a pilot, so I'm not qualified to answer this. Also, look into the Guard too because a lot of Guard units fly fighters.