new BallasScore;
new GroveScore;
new MafiaScore;
new VagosScore;
new AztecaScore;

stock GetHighestVar(...) {
    new
        highest = 0, // lets pretend that the first is the highest, it is also the fallback if all got the same value
        i = (numargs() - 1); // starts at the end of the list to loop
    for( ; i != 0; --i) { // loops through all input variables
        if(getarg(highest) < getarg(i)) { // check if the current variable is bigger than the highest
            highest = i; // sets the highest to the current
        }
    }
    return highest; // return the highest
}

switch(GetHighestVar(BallasScore, GroveScore, MafiaScore, VagosScore, AztecaScore)) {
    case 0: {} // BallasScore
    case 1: {} // GroveScore
    case 2: {} // MafiaScore
    case 3: {} // VagosScore
    case 4: {} // AztecaScore
}