Required:
- A level 70(ish) character with Adventure unlocked (main)
- At least 5 Rift Keystone Fragments
- A friend or another account (alt)
- [OPTIONAL] A semi-high level character on the main's account
If friend doesn't have Adventure unlocked:
- Have the main create a Act 5, 8.3 with the alt in the party
- Both leave game
- Promote the alt to party leader
- Hit resume
- Kill Malthael
If friend doesn't have Torment unlocked:
- Create a torment 6 adventure with a character on the main's account with the alt in party (Note: level does not change, must be able to clear Torment 6 when it is scaled to this character's level)
- Have the alt stay in-game
- Log onto the level 70 main
How to powerlevel:
- Create a torment 6 game with the highest level character that you can handle quickly without dying (i.e. the main uses a 50 alt, quests give more exp than the alt's level 1)
- Have the character being powerleveled stay in town to be safe, can follow along but VERY dangerous if on hardcore
- Open a Nephalem Rift (doesn't matter who)
- Complete with the main (Optional, have the alt port to you before the boss dies to get bloodshards)
- Turn in quest (Optional, log off the main and onto one of your alts)