I do trial and error approach by starting off small, then increase. You could ask players who are familiar with the game, youtube it, google it, etc. If the values are encrypted that's where I get lost and you might have to open the map up using map galaxy or something like that referenced in a different thread. Sterrilium used to modify a map to have the game give you max stats in game offline and save the player's bank file for you in 5 starcraft minutes or so. After the bank files been saved you'd use this signer to update the signature to your actual online profile.