I am wondering what the phrase imply, because I am unsure whether I am using it correctly in writing.
As far as I know, "were" is used we talk about a theoretical situation. However, I am thinking it does not imply logical necessity as with "is".
Take the following two examples:
If you were to insure this is done properly, you need to be equipped with this.
If you are to insure this is done properly, you need to be equipped with this.
The second sentence implies necessity, but the second seems awkward at best, because the two parts doesn't seem to match.