I don't trust Gio enough to let Mirko go. He's rarely shown the creativity that Mirko can provide.
I think Quag & Vucinic are great bench options that can make an impact in any match. Well maybe besides ones where we are massively outclassed like vs Bayern.
Tevez, Llorente, Quag, Vucinic, Gio? looks pretty good to me. Though if we had the cash available, I would like to see us sell Gio for maybe ~12m and try to buy Jojo. But I don't think Viola will budge from 30m... 20-22m is far more realistic and fair for Jojo. Might be a little too stacked though in terms of players not being happy with minutes. But Tevez, Llorente, Quag, Vucinic, Gio would still be like a 500% upgrade on what we have now.