making bosses better, how could it be done?

Not sure if it's already been done, but it'd be cool if they made a boss that's like ... say, a labyrinth. That is to say, the boss itself IS the labyrinth. There's an HP bar at the top and everything. And to lower its HP, you have to go through different rooms of the labyrinth, in a party or alone; it doesn't matter which. You could specifiy a solo option or a party option, and you could even change the difficulty as you saw fit. Each room would be akin to a room from the classic Ludibrium Party Quest, except it would be fun instead of tedious. Like ... a room full of monsters and you have to keep killing until you get a consecutive hit score (ala aran's combo) of 200 or more. Higher difficulty modes would simply up the counter; this way one couldn't just pay their way to the top. There would be obstacles in the way of reaching the next group of monsters, obviously, to create a kind of thrill. I don't know -- I'm just throwing ideas out there. The main takeaway from this is that the boss is defeated in segments, none of which involve actively attacking a single entity known as "the boss." There would be a random number of rooms each time, but the maximum would be ten. Each room gives a prize coin, so even if you fail it's not like you've wasted your time, and five of those coins can be traded for a prize box.

Now I'm just saying but doesn't that sound like a more complex version of gollux? =3 Not tha I'm saying there's anything wrong with that, but I'm thinking making nexon is slowly getting a bit better [even slightly] at making bosses than before.