If it isn't going to make a flavor difference (With that much RB, what would?), I use standard american 2-row for most things. I only really use MO in my english style beers (Bitters, EPA) and GP in my Scottish beer. Other than that, it is American 2-row, with some munich for some toastyness. I have also heard that some victory can add that MO-like biscuityness.