See if these images work for you, one is of pre-game lobby, spawns in the FFA map and Island Settings.
It used to be 25 eliminations to win but the guy who did the spawns changed it to open and kept a record of peoples score using verse so these settings might be no good to you, let me know please as I will be making some more FFA maps soon
He had issues setting things up so in the end uses teleporters with each spawn I think.
Since the day UEFN launched the FFA last man standing (modes where 1 player can win) have had issues, it is possible to get it working but you have to mess around or get the info foom others, why has this not been fixed.
Unsure if this is any good I have not tried, it says it fixes match ending in a draw
