Hey there @leprechaun,
You've got to get this query in front of people who know more than me! But for my two cents (well, 1¢ until Steem goes up again), #1 and #2 would be most useful and not existing anywhere else that I know of. I don't really know what 3 and 4 are. And #5 is at least decently covered by Steem Peak, though I'm sure more offerings there are a good thing!

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