I think we will go full rotation and probably play in a slightly different way too to keep Arteta guessing ahead of the league game, very much like we did with Chelsea in the league before the champions league final.
I suspect they'll rotate too although probably not as much as their squad isn't as good and they'll want to keep momentum going.
I also think we now need to win this, if only to try and break some of their built up momentum before needing to beat them again in the league a week or so later.