And IMO one more centre back.
I think we're ok for centre-backs (Innes, Munro & Tokely with Proctor or Golly if desperate) and centre-mids (Proctor, Cox, Duncan, Morrison, McBain all competing for 2 places). LB is an absolute priority. Forward I'm not so sure is that much needed. I'd be happy to give Sutherland, Gil and Odi their chance to back-up Rooney. After that, it's more about getting a quality player that can depose a current first-teamer, rather than any squad players. We've a good first team and lots of good young players. I'd like to see Mackay-Steven on a short-termer as it's possible he could really add to the team.
Proctor is no centre half nor is he a centre midfielder, there is no way he could wing it in those roles in the SPL. McBain will probably become a fringe player. So if Cox or Duncan get injured were humped. I'd still not be suprised if Stuart Duff returned.
But as said left back is an absolute priority! I think Golie is a great pro but a regular game at the highest level is just to demanding for him imo.