I usually am lucky finding those in Acts III Bastion Stronghold.

All the fun and the competitive gameplay starts when your character reaches level 70 (and well, when you gets some gear, but lets leave it for another guide).

Fast Power Leveling in Diablo is nothing new, although a lot of players still have a vague idea how its done.

Invites the level 1 player and start clearing Nephalem Rifts.

The other character (the one that is getting power leveled) is supposed to stay at Rifts entrances and leech the experience.

You can also find help on Power Leveling community chats or in exchange for sharing Rainbow and Menagerist Goblins with people interested in Cosmetic Items We also have a small Guide about Power Leveling that explains how you can get someone else to do it (and possibly drop you some items as well) that can be found here.

We suggest using an In-geom for it; it will let your hero to spam movement skills making you much faster.

As you can see on the second screenshot, you will also end up at around 50k DPS, and nearly 2 MIL Toughness with barely the weapon and Paragon Level 800 points assigned (no other items were equipped).

Additionally, its good to put another Gem of Ease into the weapons socket, for an incredible experience boost.

Can be done in Nephalem Rifts, Halls of Agony level 3 or pretty much anything else, where you can comfortably clear the area fast.

Making it that fast might require you also to use the Molten Wildbeest Gizzard gem, that will make you initially immune to all damage.

One of the is required to be 25 to be able to use the Work of Cathan Recipe, while the other gives you experience boost, so the higher it is, the better.

There is no other way around it, if you do not have those, please try the previous Power Leveling Mode.

Their rarity, however, makes them nearly impossible to obtain for casual players.

The easiest and safest way would be to buy them on Odealo market from professional boosters.

You can find it yourself as well, you will need someone to stay in-game while you relog on your level 1 character, and have the other person finish the even while you leech experience.

If done on Torment VI difficulty, with an experienced players killing the Cows (preferably with good AoE damage) you can reach level 70 within minutes (literally).

If you have a well-geared character on your own, you can also find the even yourself, and when you do, invite a friend of yours to clear it for you while you swap to your level 1 character.

It is advised to pick significant areas with good monster density.

For example Fields of Misery, Dahlgur Oasis, Weeping Hollow, Paths of the Drowned, Battlefields of Eternity and several more areas will make an excellent choice.

It all depends on how much experience do you have with this one.

You will get several useful rares from the chest after they are dead.

Diablo 3 How Does Area Dmg Work