No, levelling does not improve luck, but that is easy to do with either a common event, or it would be a simple script addition. You set up the loot as you would normally, in the monster database screen. It would be a simple edit to remove the extra gold/experience, but one I cannot do right now as I am on vacation. I suggest you ask these questions directly in the script topic and maybe Falcon will do it for you (don't post a link to this topic, but retype your questions in the topic). If, by the time I get off vacation, nobody else has done the script edits for you, then I will do it as soon as I get frustrated with the other stuff I will need to do.