I bet on the ndrangheta because made bussiness in canada with the Canadian Mafia and the chinese big circle boys and native crime groups;in NY replaced the mafia for the coke traffick with the 5 families and made bussiness diectly with the colombians or the los Zetas (and saved numerous mobsters that risked to die because can't pay for the drug) and divided the whole Australia and i don't speaked of europe where had the monopoly on coke traffick.
In few words it are word wide while the Russians or the chinese wasnt present in all the continents.