I'd start with King & rotate Walker with Nicholson instead.......as good as Nicholson has been at times this season he's gone off the boil of late for which I think Neilson has rightly taken him out of the team for.
I was a bit frustrated with Walker in the 1st half yesterday.....he had 3 opportunities to run at McGregor (a CH played at RB) and checked back every time! Can't complain too much though as he did a lot better 2nd half.