Here is a very simple idea for a pvm tournament.
Let me know if you think this could worth a try.

Objective: Rush crucible as fast as possible
Time Ladder - 3/4 players per team

Time start as soon as the cruci scroll is identified.
Time's end when last cruci boss die.

We could keep the records in a "Pantheon of the Crucible Runners" list or some shit like that xD