I was just thinking about it yesterday, while I was wondering if Kazan could be considered the strongest team ever. Because of I follow this sport since the 90s, I will propose only teams from that period onwards.
Ravenna 1990-91: Vullo - Timmons - Gardini - Masciarelli - Margutti - Kiraly
Parma 1991-92: Blangè - Carlao - Dal Zotto - Bracci - Giani - Gravina
Modena 1996-97: Vullo - Cuminetti - Giani - Van de Goor - Bracci - Cantagalli
Treviso 1997-98: Blangè - Fomin - Gravina - Gardini - Bernardi - Zwerver
Trento 2009-10: Raphael - Vissotto - Riad - Birarelli - Kazyski - Juantorena - Bari
Kazan today: Butko - Mikhaylov - Gutsalyuk - Volvich - Anderson - Leon - Verbov
Just add other teams if you want, and then I ask you Which would you choose among these?