This post was actually based off a reply I made to a post “Idias from Russia.” Click here to look at the post.
Copied off the reply by me:
I had this idea based off of Starbreak’s system.
Why not increase the amount of HP based on the amount of people present? This will probably work best on dungeon bosses. It can also work best if there are certain people in a certain area.
Another idea - why not add damage gates? Similar to Starbreak’s System, the more people = more damage needed to pass the gate. Once enough damage is dealt, the boss goes into it’s second phase, and so on.