1. Yes, if you want to have normal test levels.
2. No- you will be doing this for life.
3. Usually, not once you get your proper dosing figured out. It seems that it used to be common to just prescribe a bunch of test and then an AI to counteract the effects. Now people are getting smarter and have adjusted the amount and frequency of test to avoid this. Some people may still need an AI though.
4. No, they are worthless.