Anyway, my idea:
Wait, I gotta know. Is this a fighting map? Because I have ideas for progression. I am always all about progression, checklists, going up the tiers of weapons and such. For example, the beginning would be a Tier one spawner of, say, zombies or something. If you deposit x number of rotten flesh, then you get to the next room. And the items you would first have would be a Wood Sword and Leather Armor. If you end up using Tinkers Construct, this idea of progression would get much, much better, considering how you can modify things. A good door would be a mystcraft portal that disarms. This way the player cannot bring any of his old items into the next room and thus deposit older stuff. Then you could give him new items.
Do note, however, if you do not at least make one or two of your own challenges, I will delete this post. I do want to hear some of your creativity also. Thank you.