Hey Cactus Man, can't say I've mixed coca with brandy but answering your question "Is something like this better to take sublingualy or orally"
I would personally consume this beverage orally as the dosage you've mentioned in your post, 50g (approx <255mg cocaine) therefore under <56mg per shot seems like an awful amount to consume so rapidly and could really exacerbate the negative side effects that this drug has to offer such as the moderate-intense craving it can induce after cocaine-blood concentrations begin to diminish and even more so after a relatively rapid come up such as the sublingual route in comparison to the oral route.
So with this type of dosage I would personally go with the slower ROA in order to reduce the unwanted side effects, which could potentially cause someone to become dangerously intoxicated.