Yep, steep angle for all passes. BUT, I'd like to highlight the fact that if you are using the 2011 R41, an ATG pass shouldn't be necessary. Just WTG, XTG, and "maybe" small touchup. And trust me I have as thick a beard as anyone out there. (This is the really amazing thing about the 2011, to me).
With 2013, it's the full 3 passes. And, with both razors, all angles are steep. For me, that is.
You know, I've never done that. I almost always do a WTG, ATG and then XTG. But I think tonight's shave will be a WTG and XTGx2 going in each direction.
I usually use a steep angle for the WTG and then a shallow angle for XTG and ATG. I'm going to have to start experimenting more.