so what is the best balancing method

I used a tire machine at one of the shops I worked at when I was way younger that ran the tire on a drum (kinda like a chassis dyno at 10mph) but for one wheel at a time and shaved the tire perfectly round under rolling load conditions and then spin balanced it.
You couldn't even feel that there were tires there, let alone spinning.

It was the computerized big brother of those old hand operated tire rounding machines.

To the question, static works, but spin is better (if the person doing it has a clue)

IMO