Think Qs is roughly right. Arteta's technical ability is fine he's just old. Monreal is a backup. Giroud would be replaced. Podolski's a mystery case.
But even with just a new striker our first choice would be something like:
Szczesny
[Sagna] Mert Kos Gibbs
Ramsey Wilshere
Ozil
Walcott [Striker] Cazorla
With Podolski, Chamberlain alternatives on the left and Wilshere an option on the right or midfield, and Giroud, Sanogo and possibly Campbell off the bench.
We could jettison any of Podolski, Giroud and Sanogo so long as we keep options.
After a striker, my biggest concerns are probably Jack's fitness and Sagna's prospective departure. We need a physically robust good quality midfield option and a right back.
Our biggest problems have been that our midfield has been mediocre since Ramsey injured himself and we have no firepower.