Boss summoning easier?

[Poe 2]

In teeria, the way their Arenas work is that they have signs that you break to summon a boss with other enemies. On the sign they have this plugin/commands that summon the respective boss when you break the sign. Therefore, eliminating the need of multiple arenas, for low level bosses. For High level bosses, the have an Hardcore Mob arena with hardmode bosses. Just an Idea