Well since unranked in OITC has been removed, less players are playing the game, Less 1v1s are being played. The game is basically on the edge of leaving. #prayforOITC
Honestly, OITC should just be moved to other game servers like factions or skyblock as a minigame. You can implement it as a sort of gamble in factions for example. What I mean by that: It can be used for 1v1s between players. Both of them put up a certain amount of money that will be given to the victor of the duel. This could both save OITC in a way and improve activity on these servers.
Honestly I don't think that should happen, because 1 The OITC Community has had a long and rememberable history over time. 2. it would upset a lot of the players (myself included). 3. People would get confused that it's crossing over to another minigame. But it's a nice idea you have but I don't agree with it personally.
While I agree that OITC had a good community, that community is mostly gone now, like you said. I can barely have a duel with someone on it unless I’m specifically asking multiple players to come about and play. I can understand why you would think this is upsetting, but regardless of the decision made, OITC would soon die anyway because of an extreme lack of players on it. My suggestion could still kind of save it for a short while.