New PvE "event" - gauntlet/endless wave node, but with a twist

Choose 3 characters and see how many rounds they can last.
1) No team ups allowed on either side.
2) Damage/health carries over to each round, and when you're defeated or call it quits.
3) AP does not carry over. (Sorry, Nightcrawler, no BAMFinite
4) Board resets after each round. (Sorry, Medusa, Carnage, and Carol
5) Level of difficulty based on your own roster, or maybe even the team you take in, so even new players could participate.
6) Each round gives a reward (Iso, tokens, etc.) and the more rounds you clear, the better the rewards, but you don't get any rewards if you don't clear at least one round. No "placement" rewards, but there could potentially still be a "leaderboard" showing who has cleared the most consecutive rounds that day, and what team they used.
7) The event never locks but could be attempted multiple times per day, just as long as you have 3 characters with any amount of health.

Edit: added 'consecutive' to item 6 for clarification.