His movement and penetration by foot reminded me a lot of Paul Wheatley actually. His replacement, perhaps?
As for the topic itself, we must get our hands on two elite/class mids and finish off our midfield stocks, before we look to our rucks. I think everything else will fall into place, if we have a good enough midfield.
IMO, ruckmen aren't as important as some people think. If your centremen are clued up enough and read the play well enough, as long as you've got a big man competing against the opposition ruckman, you should win most clearances.