Perform different actions in top 3 values in Dictionary?

I have a sorted dictionary with certain number of entries:

dict = {B:3, A:2, C:2, D:1, E:0, F:0...}

After filtering the dictionary to get only the entries with top 3 largest values:

result = Object.fromEntries(Object
    .entries(dict)
    .sort(([, a], [, b]) => b - a)                         
    .filter((s => ([, v]) => s.add(v).size <= 3)(new Set))
);

The current dictionary is

{"B": 3, "A": 2, "C": 2, "D": 1}

So I am trying to add 4 to the largest values,2 to the second largest values and 1 to the third largest values, what are the ways to do this?

One of the ways I can think of is:

for (const key of Object.keys(result)) {
     // if result[key] largest
            //plus 4
     // if result[key] second largest
            //plus 2
     // else
            //plus 1 
}

Thanks for reading..