Holy Grail in Resurrected (Brainstorm)

Hi guys! This is a brainstorm topic for a potential future site feature. I've ran these types of discussions before (example) when I designing parts of the item database.

So couple of things I thought would be interesting to talk about here. First of all I'd like to know if there is any standard, commonly accepted set of 'grail categories' for Holy Grail completion goals, and what their nuances are. I know that the grail scene in Resurrected is pretty much non-existent at this stage in the game's cycle but interested in it for future tooling.

I've heard of '

Eth grail' which is collecting all Uniques, Sets, Bases etc. including ethereal versions of items where possible. There seem to be a number of different types of grail 'categories' like this out there and my game knowledge isn't strong enough for me to tell the 'meme' categories apart from the actual serious categories.

What other categories of grail collection are there out there, and could we define them clearly with a bullet point of requirements or restrictions? Can their completion time be estimated pessimistically? What would the most completionist form of grail category look like, and what would the middle Ground category look like? How many items would be required to complete a category, and therefore how many mules would be needed to store the grail taking into account one already fully-full private + shared stash on main char?

I'm basically thinking of making a holy grail/mule manager and tracker which integrates fully with the marketplace and database. Kind of like creating a trade listing, you'd be able to make an entry in your 'Grail' including the item's drop location, a screenshot for verification, and any other pertinent details. Then viewable alongside other items in your collection and searchable/filterable etc.

This would be fun for me to build out and would give people a home for storing their grail adventures in rich and interactive detail. What other things would you guys want in a grail/mule manager & tracker tool like this? How would we get people to properly verify their grail collection? How could the tool leverage other data on the site (ie marketplace/database data)?

There are already some great tools out there such as https://d2-holy-grail.herokuapp.com/ which fulfil the core purpose of tracking which items you have, but were never built out or integrated with anything else. I think that the site could have quite a unique thing going on with grail seasons, shorter categories, leaderboards, stats/graphs, feeds and the like.

Whatever your thoughts are would be interested in hearing them.

PS Running some bug fixes next week, sorry I've had IRL things to take care of recently.