Practicing on Java applets again and finished this little project. It contains two tabs, one where you insert the 5 monsters that appeared in the exploration and it gives you all of the possibilities, and another one where you can search for the monsters you need to defeat in order to get a certain result you want. It's pretty simple, but I think it can get the job done.
Keep in mind that if out of the 5 monsters you defeat, if there is one that appeared more than once, they only act as one monster. So even if you defeat two Deviljhos, you will never get a Deviljho x 2 quest from those two Deviljhos. You will get 2 quests, one for each monster, but the content will be chosen from only one Deviljho. So you can get Deviljho x 1, but not x 2.
I'm not too up-to-date on the Java security issues and all, but I think that if your Java is too updated, there is no chance it will allow you to open the Applet. You need to lower your security to Medium, it seems? But newer releases erased the Medium option...