Excellent circuit, tempting to just do it 13 times anyway Desgrange-style and see who makes it.
I'm sure the Sheffielders will appreciate the comparison to Rome.
It's not going to destroy anybody but I'd reckon that Cansiglio refers to Passo Della Crosetta which, assuming they take it from the Sarone side, is a fair obstacle in comparison to Sella Fadalto, 15.5k at 7%