In this comprehensive farming locations guide for Diablo 2 Resurrected Season 6, we will introduce some of the best zones in each difficulty Act for acquiring loot and progressing your character's power. Starting in Act I, here are a few optimal farming spots:

The Pit

The Pit in Act I is one of the most popular farming locations in Diablo 2 for its open layout and abundance of weak monster types. Both levels of The Pit contain various champion and rare packs that can drop high runes and other valuable loot. With the addition of Terror Zones in Patch 2.5, The Pit remains a top choice for gearing up in Hell difficulty.

Countess

Found in the Tower Cellar of Black Marsh, the Countess is a reliable source of mid-tier runes. Between Normal to Hell difficulty, she can drop runes up to Ist and Lo respectively. While her individual drops may not be influential, running the Countess provides a steady stream of crafting materials. For rune hunters and twinked characters, she remains a staple in the farming circuit.

Mausoleum

Located in the Burial Grounds, the Mausoleum is the first Area Level 85 zone accessible in Hell difficulty. Despite consisting of lightning immune monsters, its spacious layout makes it appealing for early Hell farming. The Mausoleum is also a convenient spot to gain levels and acquire better gear before progressing further in the game.

Act II Areas

Some top Act II farming locations include:

Ancient Tunnels

As the earliest reachable Area Level 85 zone, Ancient Tunnels offers ample monsters and reward chests. Its secluded entrance promotes fewer player interruptions compared to open world zones. Both the level layout and mob types favor ranged and summon/pet classes over melee.

Maggot Lair Level 3

Despite the trek downward through Maggot Lair levels 1 and 2, level 3 contains the coveted Super Chests as well as the boss Coldworm. With proper gear, this zone provides ample monster density and income comparable to other top Act II farming spots.

Act III Areas

Some examples of powerful Act III farming zones include:

Lower Kurast Super Chest Runs

The Secret Cow Level isn't the only area exploiting Super Chests. In Lower Kurast, repeated runs through the maze of temples can yield multiple Magic/Gold monster packs along with Super Chests. With enough luck and Magic Find gear, desired items are within reach.

Arachnid Lair

Recently upgraded to Area Level 85 in Patch 2.4, Arachnid Lair contains ample spiders along with the boss Ssark. Clearing the waves of spiders rewards good experience and drops relative to the zone's ease. The added value of its entrance beside the Spider Forest waypoint further boosts its viability.

Conclusion

In summary, effective Diablo 2 farming requires matching your character's capabilities to suitable zones. While this guide covers some meta farming locations, alternative level 85 areas or those with favored immunities can perform just as well. Most importantly, ensure to have optimal gear and items for your specific build before partaking in end-game hunts. Consult build guides and item rankings on sites like AOEAH for purchase options and itemization tips.