Hi!
I suggest you to come to BLQ on weekend, when there are many charters (Small Planet IT, Air Italy, Blue Panorama, Neos, Spanair etc.)..Next monday (5th sept), there will be 4 Cruise charters operated by Pullmantur Air (B744) and Air Europa, you can follow the thread dedicated in Mondo Spotter to know the timetable..
About the spotting points, you can see the maps here --->
http://www.volabologna.it/it/marconi/spotting-point/ (points 2 and 3 are the best in the eastside), and in the terminal there is Ciao restaurant (3rd floor) which has a great view of the east apron (mostly used by Ryanair, Alitalia, Air France and many others regular airlines) and the runway...