Yes, my bad. I had to show this detail in my demo.

After some discussion we decided to use docxHtml function.
Using helpers we creating a string with dynamic html code, where we can managing columns using "td" tags. Then we just call this html string using docxHtml function in template document.
It is seems like better way for now.
But if something go wrong, I will return to this discussion.
@bjrmatos thank you for assist!