I can't of course know for certain what advice Ashok would give you regarding this, but I strongly suspect that he would echo this thought, as it accomplishes the same goal. I believe his technique (which is really mindfulness meditation, without being called such) is presented in a simple manner to make it easy to understand, and not offensive to any religious beliefs.
Also, Your whole God visualization seems perfectly suited to his other advice in the program, which is to increase your thoughts towards love, health and healing. I don't think the specifics matter as much as the intentions. And all of the practices seem to be in alignment with what he is advising throughout the program:
Eradicate negative thoughts
Calm the nervous system/amygdala down with daily meditation
Increase your thoughts and visualization of happy, healthy images.
It sounds like you've covered all of those bases.

