I should have believed Florian - the ingredients don't align here.

I only had double and no milk, so I just used that (ie 3x30ml) and I added 10ml of Amaretto.
Mrs Jones & I pleased that in a recipe with some big personalities, nothing dominated and the cocktail became a whole new taste.
Less dairy worked well; too much dairy (Brandy Alexander) and my mouth goes claggy.

Ratios provided a very tasty drink with Campari and Punt E Mes rather than Struchi (isn't Campari the default for Negroni?).
A great aperitif.

I've tried the rest, this is the best.
(Aperol is particularly bad.)
I didn't enjoy it at first, but I'm glad I persevered. Boulevediier and Negroni are amazing.
All hail.