It is not enough to change Traya. ZFin and C3-PO can get in an infinite loop in arena as well. There was that video with a zMaul-Triumvirate-Nest team facing zFin and C3-PO and basically the resistance team was hitting Nest for almost two minutes without anyone else taking a turn until the battle timed out. It's one thing to get to a situation like this when there is a stand alone Nest vs zFinn or CLS C3 team, but all the other 4 sith were alive, they were just stealthed and couldn't take a turn.