Well I will answer why I would consider it a curiosity what might be considered optimal brainwave patterns or frequency.
While the body of knowledge on the subject grows rapidly now, so too the speculation on its meaning and merit.
Bodies respond to demand, persistent demand of desire. So what you require will unfold to meet said demand. Want to do a thing? Then as you desire and get after it, the bodies will respond to your demand and if that means you need any certain 'brain frequency' so it will be for you.
However, whatever it takes to be so convinced is important so far you make it a 'requirement'.
As to 'visualization'; that is God Power in you working out your own 'unfoldment'. Any activity that supports that, supports personal power.
