Best Option Out of 3?

3 sentences with very small differences between them:

"I feel like it's best to be conscious of his presence—and to be acutely conscious of it—but not to let it change your actions unduly. "

Or: "I feel like it's best to be conscious of his presence—and be acutely conscious of it—but not to let it change your actions unduly."

Or or: "I feel like it's best to be conscious of his presence—and acutely conscious of it—but not to let it change …"

I understand there's probably no definitive rule on this? So if not, which one is more right? Or even … just which one sounds best? Thanks!