All about skills, stats, equipment of the Diablo 2 Whirlwind (WWsin) Assassin build
The Whirlwind Assassin or WWsin is an Assassin build that takes advantage of the Barbarian’s Whirlwind skill. She gains access to it by using the Chaos Runeword. This type of Assassin is designed mostly for PvP fights. However, it can be used in PvM as well.
The main disadvantage of this build is the short range of Claw weapons. It makes challenging the proper use of Whirlwind.
The build requires lvl 84, leaving you with 15 points to spend. Many players place them in Blade Shield or WeaponBlock
Martial Arts Tree
For PvP fights, you’ll need to acquire Dragon Flight in order to come close to your opponents. This skill’s prerequisites are Dragon Tail, Dragon Talon, and Dragon Claw. Dragon Flight can be useful for PvE too.
Shadow DisciplinesTree
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Traps
The best possible choice is a defensive Mercenary (Act 2 – Nightmare) with Holy Freeze Aura. This way you can slow down tour enemies and hit them easier with Whirlwind.  If you prefer a more offensive setup, choose the offensive version of this mercenary with Might Aura to boost your damage output.