My entire plan of attack point about hitting Olivanders first is getting it done early and not taking a chance of running into a huge line later at night. Because once the end of the night hits you will want to spend as much time wondering around the shops and getting that final ride in on the FJ before the queue closes.
If I was to recommend any plan of attack to any person, whether it be a stranger, family or friend I would stick to the plan I posted on the previous page. It has worked for me time and time again on numerous trips with family and friends who went for the first time. In the future plan on seeing a guide that takes it to the next level.