So, 80 kills per hour.
She spawns 80% of the time, so 80 kills = 100 occurrences of the right dungeon.
The right dungeon is 50% of the time, so 100 of the right dungeon is 200 games.
200 game remakes in 3600 seconds is an average of 18 seconds per game.
So, that’s an average of 18 seconds to start game, confirm there aren’t discounting bounties active (two of the possible bounties ensure the wrong dungeon is present), teleport to the right map, scout for the dungeon, clear two levels of the dungeon, teleport back to town, exit game. Doubtful, but let’s go with it.
Well…
…if we believe your 18 seconds per game average claim, roughly 49 out of 50 players would have it in an hour or less.
If.