I don't think that Rodwell will go in the summer, he's not really shown that he's over his injuries yet so I doubt anybody will be willing to pay £10mil plus for him.
If we get Pienaar and Drenthe in then we have two options for each wing (coleman and gueye). I doubt that we'll sign more than one permanent player in the summer so we'd need either a striker, some creativity or a right back.
I think that we could probably get a backup striker on loan (maybe Lukaku, Bentder or someone else young from the top 4 clubs) along with possibly a right back on loan and then focus the money on a creative player.
I've always liked watching Mauro Formica at Blackburn and I don't think that we'd be able to buy anybody more expensive. Of course the other option would be to go cheap and unknown and rotate with Osman in the hole.