Trapani mafia is very powerful , probably right after Palermo i would say , Catania is also up there but i would say Trapani is more powerful.
I read in some book (I think it was Salvatore Lupo's "History of the mafia", although I am not 100% sure), that Tommaso Buscetta said that, if we evaluate each province's power by a 10-point scale, then Palermo would be 10, Agrigento and Trapani 8, Caltanissetta 6 and Catania 4. Strange he didn't mention Enna, and I thought Trapani was more powerful than Agrigento, but he put them on the same level....