When you go for stamping, it will be hard to justify that you will not immigrate or settle down in US, the reason is that your spouse ( who is on H1B now) would be there and you changing your status to H4 and applying for Green card indicates your immigrant intent …so, it will be hard…Some had success with the stamping, many had failures.
Unless, there is an emergency or compelling reason, you should avoid going for stamping…it can be risky.
Well, there is nothing called best…it is relative…
My view is that you need to state the facts and answer your interview questions with conviction…The moment you get answer from someone else like me, you miss that conviction and you will not be able to further answer, if they go deep. So think of your situation and come up with something that is genuine and also sensible…
Do share your update and experience with community here once you go for stamping…