Vaal Foundry Boss arena unable to finish map if boss killed too soon, needs way point / exit

Title.
Vaal Foundry w Boss
If all rares are not killed prior to boss fight, the player is unable to leave the arena OTHER than a portal.

Waypoint is outside of area, rendering it useless after boss kill.

Using a portal in this scenario = hideout
reentry of hideout/map device portal = player stuck in same trapped area


SOLUTIONS
1. bring the platform device down into the boss arena on boss kill

2. Spawn a way point in the boss arena after boss kill AND make sure if a player for some reason missed a way point they CAN GET BACK TO map start.

3. Player dropped portals can have a second feature AS waypoints.
long-press/something reasonable for CONTROLLER users and it's a portable way point OR portal.

4. you can use blink to get out if your movement speed is high enough / you have enough spirit to run it. ( FWIW - blink is way too spirit expensive as are cast on and blasphemy)