Having tried this a few tunes in different permutations, have reverted to Simon’s specs - although there were 20ml of Averna left in the bottle… Had been using a tenareze Armagnac which didn’t balance well here. A Bas Armagnac worked much better.
I really like the flavors: cola, almond, mint, citrus (the lemon peel is an absolute must). Echoing the other review, it's a little too cloying. I could up the brandy, but I'm worried that would throw the balance of flavors off. I'll either do that next time or try adding some bitters. But the combination of ingredients has potential.
Update: I tried this again with one dash of Fee Brothers black walnut bitters and it balances out the cocktail nicely without influencing the flavor all that much.
I see potential here, but in this configuration it's definitely too sweet. So, more armagnac and less amaro and maraschino. Made with lauvia hors d'age, ramazzotti amaro, stock maraschino.