So we’re going to need to use some basic linear graphing in order to achieve this.
Before you start, you need to get the zone of where this boss fight is. I’m assuming this is a rectangle so you’re going to need to find the maximum and minimum x and y values for your room. A guide like this one could help you find those coordinates.
You’ll also need to create a Property. You’re going to need to select the “Property Type” option as “True/False”, “Default Value” as “False”, and “Property Scope” as “Player”
Afterwards, you’re going to need to set up some blocks in a Player Coordinates device that update a property if the player is within the area of the boss room. It should look something like this:
Next, you’re going to need a Trigger device to help trigger the Notification and Waypoint. Set the Trigger to trigger when your boss has been defeated. Assuming your boss is a Sentry, either run a wire from the Sentry to the Trigger or let the Sentry broadcast a message through a channel to trigger the Trigger. You should also change the “Active Scope” option to “player”.
Now you’re going to need to set some blocks up in the Trigger to only broadcast a message on a channel the property is true. It should look something like this:
Finally, you just need the Notification and Waypoint devices to activate when a message has been broadcasted on the channel. Ensure that your Notification’s “Send Notification To” option is set to “triggering Player” and your Waypoint’s “Active Scope” option is set to “player”.
Now if everything is in place (and I’m hopefully correct), this system should send a Notification and activate the Waypoint when the boss has been defeated and only to the players within the boss fight arena.