But surely spending (in worst case scenario) 3 minutes total playing the game out of 3 hours is awful game design. Times have moved on from that. I did kings because that and Sky was all the game had in the Zilart days, not because I enjoyed it. The fights were great if you managed to get a claim but it was bad implementation.
There's ways to implement items such as Ridills and have them just as rare without the game being a pain in the ass or spend 2 hours 57 minutes of every 3 hours doing anything but playing. The dungeon speed run in XIV right now is a good example of how to make items rare. No one on my server has a sword or bow. Implement something hard like that with further criteria for your Ridill and they become even rarer. For example, require a drop from three different dungeon's speed runs to be exchanged for an item. You then need skill in multiple scenarios to get your rare item.