Does high math classes=better chances at ivies?

I am a VERY well-rounded student. No need to worry about all that. But, my big seeking point is that I am taking ap calc bc (calc 2) junior year, and the next step senior year.

Will this be a selling point for colleges to accept me? Does it help my chances significantly? Or is my type a dime a dozen for upper LACs and ivies?

I would not go that far. However, it is nothing that will increase your chances for admissions.