Hey there. Sorry for the delay in responding.
Well, I understand what you're trying to do, but this plugin is more geared, as you can see in the video, towards comparing statistics among the group (damage dealt, damage received, healing done, etc.). What you're talking about is more like a system of simple missions, achievements, and rewards.
So I'm not entirely sure this will serve 100% of what you need. If I can help with anything else, feel free to let me know. 👍🏻