@PriyoGoldenSunrise
Ok. So what visualisation are you refering to in your main q for the 4.examples you shared?
If you are refering to visualisation as an LOA technique, its your choice.
One can request VK even without visualisation. Its not a must. Only intention is eneough with VK.
LOA and VK healing works wonderful with a happy state of mind.
While using LOA techniques, one should be easy and happy with desire. LOA effect slows down with a sad or anxious feeling.