Here's a guide for a Rift Assassin build in Diablo II: Resurrected (D2R). This build is designed to excel in Rifts, providing effective crowd control, mobility, and strong AoE damage.

Rift Assassin Build Guide

Overview:

A completely unique playstyle to the assassin using your powerful dragon talon to kick orbs into your foe's face, it doesn't scale well beyond player 3 difficulty but it is a fantastic fun build to play solo.

Skill Allocation

Place one point into each of the following

Dragon Flight
Cloak of Shadows
Mind Blast
Blade Shield
Fade 
Shadow Warrior

Place 9 points into 

Burst of speed
Fire Blast (Synergy for death sentry)

Twenty points into the following in this order

Dragon Talon
Venom
Death Sentry
Shadow Warrior

     

      Stat Allocation

      1. Strength: Enough to equip your gear 
      2. Dexterity: 0
      3. Vitality: All remaining points into Vitality
      4. Energy: 0

      Gear Suggestions

      Weapons:

      • Rift Rune Word: into Flail or War Scepter

      Armor:

      • Enigma: For teleportation and mobility.

      Helm:

      • Nightwing's Veil: (Socket with 5/5 Facet or ist/cham)

      Belts:

      • Arachnid Mesh

      Gloves:

      • Dracul's Grasp

      Boots:

      • War Traveller/Shadow Dancer  (Upgrade these to increase kick damage)

      Rings/Amulet:

      • Mara's or Rare/ Crafted + Assassin skills Fcr amulet 10 fcr or 20 fcr
        1 x FCR Mana Stolen per hit All Resist Ring 
        Raven frost or Bul Kathos

        Inventory

        Assassin Torch
        Annihilus
        Gheed's Fortune
        Cold Rupture
        30 x 7% Magic Find + All Resist & Cold Resist Small Charm

       Act 2 Offensive Mercenary

      Andarial's Visage
      Ethereal Fortitude
      Ethereal Infinity

      Gameplay Tips

      Lay your Death Sentry before diving into enemies and unleashing Frozen orb death