The ultrasonic head don't last that long in high EC numbers and they are on an 8 hour cycle then a cool down. Is it the best... debatable. Again, it depends on your situation.
I'm aqua-aero, low pressure. With fish, I have best system, imo. High pressure won't work for me, so it's not the best system in my case. Fog is nice, but it's not enough to filter the water to keep the fish alive, so it's not the best system. DWC works well, but I find that my roots brown more easily, so it's not the best system.
"Best" is a relative term, and it can mean many different things. It's all about what youre trying to accomplish that matters.