We should get some pvm dungeons doe, use command blocks for specific item locked doors and make it so mobs have a % chance of dropping that key item that will allow you to unlock doors (i suggest a tripwire hook since it looks like a key). You can also use command blocks to make custom mob spawners and that'll be fun for tthe whole famiry. You can also make mobs have a % chance of dropping some of their items.. maybe a way to get chain mail??????? Hmmmmm???? Or if you really wanted to you could tie in enchanted tools which would be an indirect buff towards miner and maybe fisherman..