The goal is to make single player more convenient without making it too easy. There are no changes to drop rates or monster levels. Saves are fully compatible with vanilla. I made it mostly for personal use to make the single player grind more enjoyable. I'll keep making changes as my D2R modding skills develop and new tools become available. Fully compatible with GoMule.

New updates:

• Bovine Conspiracy
  

As the hero defeats Baal for the first time, the Hell Bovines grow in numbers. Several Bovine Warlords took up residence in the lower levels of Halls of the Dead. Halls of the Dead levels 2 and 3 are now several times bigger and filled with Hell Bovines. Area levels are now equal to the Secret Cow Level for the current difficulty. Very convenient grinding spot with a waypoint. This only applies to Nightmare and Hell. In Normal, the dungeon remains exactly like vanilla.

• Loot filter
  

The way how several types of item names are displayed was changed. Shortened potion names in corresponding colors, "Hidden" mostly useless items like Arrows, Bolts, Thrown Potions, etc. Flawless and perfect gems have gold names. Some white bases, like the Monarch or Thresher are highlighted. Scrolls are green.

Currently in progress:

• Tweaking Act V mercenaries for better survivability
• Trying to make it possible to visit the Cow Level before killing Baal.
• Increased the mob density and removed the waypoint in Nihlathak's realm. The red portal should never disappear, making it a great grinding/farming spot.
  

Features:

1 Merchants
Akara now sells:

• chipped gems
• talismans
• herbs (used in most cube recipes)
  

2 Cube recipes
2.1 Cow Level Portal

• Book of Town Portal + Herb
  

2.2 Reroll Sockets on a Socketed Item

• Any Quality Socketed Weapon + Chipped Diamond + Herb
• Any Quality Socketed Armor + Chipped Topaz + Herb
• Any Quality Socketed Shield + Chipped Amethyst + Herb
  

Rerolls the number of sockets on any socketed item, within the possible limits. Any items already placed in sockets are recovered.
2.3 Crafted Teleport Staff

• Magic Staff + Key of Terror + Herb
  

Creates a lvl 1 crafted staff with +20 to Teleport. Required level: 65.

2.4 Token of Absolution

• Tome of Identify + Chipped Sapphire + Herb
  

3 Mercenaries
All mercenaries have their models replaced with class models. That means that any equipped armor or weapon is visible.
Act I: Model replaced with Amazon. Might or Prayer added as an extra skill.
Act II: Model replaced with Assassin. Jab was replaced with Inner Sight.
Act III: Model replaced with Paladin. Might or Prayer added as an extra skill.
Act V: Model replaced with Barbarian. All skills replaced, now they have Berserk, Battle Command and Pride/Defiance.
4 Extra stuff

• Necromancer's revives no longer expire with time. They will still sometimes mysteriously disappear, but generally you can safely afk.
• Item levels and rune numbers.
  

5. Instructions

• Open your D2R directory and create a shortcut of D2R.exe
• In the properties of the shortcut type " -mod solitary -txt" at the end of target line.
• Extract this zip file to the Mods folder inside your D2R directory. If the Mods folder doesn't exist, create one.
  

Special thanks to authors of the following mods:
Singleplayer QOL enhancements
Female Mercenaries
Lower Resists
Rogue Encampment Merchants Plus
A lot of the features are inspired by these mods and by analyzing them I learned how to make the specific changes.