How would Kalista work in One for All?

If your team chose Kalista for the One For All gamemode, that would mean they could make each other their Oathsworns. If two Kalistas made each other their Oathsworns, then what would happen? For example, if two Kalistas who Oathsworned each other, which one of their Sentinel passives would proc first? Would the game be able to pick who's auto attack works, or would the game not know what to do? How about if a Kalista was Oathsworned to two or more Kalistas? Let's say Kalista A and Kalista B chose Kalista C for their Oathsworn. If Kalista C auto-attacked a minion, would Kalista A or Kalista B get the gold?

Would the game be able to figure out which Kalista gets the gold, or would the game sh*t it's pants and crash?