I think we would run with Ramsey and two of Williams, Witherspoon and Durant, depending upon the situations and health. The odds that all four are healthy for all the games are low, so, like most positions with the Rams right now, they are building depth that would cover in case of accident.
As an aside, the glaring lack of said depth at the tackle position is scary, especially because it stands out so much when compared to pretty much every other position on the team (especially if they bring in another corner - Ramsey, Samuel, etc. ).