Sorry but this makes absolutly no sense.
If you want a challenge, make an offline character and beat the game on players8. It increases monster health, damage, xp and loot. Typically people play normal and nightmare and players8 and hell on players1. Self found characters can’t do hell on players8 unless they spend some time farming for gear.
When you’re in offline mode, you can also set players8 in the options menu. When you start the game you will see a chat message that tells you what players setting you’re on.