I good place to look would be at a currently running tournment such as
@Babyhell https://www.purediablo.com/forums/threads/march-of-the-doomed-running-thread.14751/
For your #2 it would depend. In my scenario with general rules applying, there would be a maximum of 10points since the tournament officially starts in Hell and no higher than clvl76. You'll end Act 5 doing single pass either 81 or 82 depending on mobs and how much of a full clear you do.
There are no judges as you could easily fake screenshots, etc. If you need a forum achievement/trophy that bad and have to disregard the restrictions for your own "I'm a l33t gamer" you go!
Usually, participants are people who want a challenge. A melee barbarian or paladin in this rare only tournament sacrifices at least Crushing Blow, Open Wounds, and Cannot be Frozen.