A little inconvenient, but this might help you to reproduce random games on the server.
Just call these functions (or the equivalent in your language) depending on your own player ID:
if myID == 0: player0()
else if myID == 1: player1()
For one player you have to make sure that you only replay the game until a certain point - as you want to reproduce that behavior.
Or you submit that dummy bot and play your arena code vs IDE code if your own code is deterministic.