Now that those caveats are out of the way, lets get right into all the numbers
This won't win a cEDH tournament, but I like how it combines airbending and waterbending, or at least what those mechanics care about, into a couples' card
As for the sideboard, I'm not too impressed by Illness in the Ranks and might rather just pay full price and get Curse of Death's Hold.
Since Boiling Rock Rioter's activated ability doesn't have a tap symbol in its cost, you can tap a creature (including Boiling Rock Rioter itself) that hasn't been under your control since your most recent turn began to pay the cost
They can be flashed back with Snapcaster Mage or Lier, Disciple of the Drowned, or returned to your hand via Archaeomancer
It's Archive Trap with extra steps, sure, but it's satisfying and surprisingly powerful once the card goes off