The Zealot begins the game pretty well with Holy Fire and eventually works his way up into running Zeal with Fanaticism. He is extremely strong for a Melee Character and can handle medium-sized packs, but he really shines in Single Target Damage.
These videos are meant to give you a complete “follow along” style playthough of many popular character builds in Diablo 2.
Video Build Guide
Since Zeal is a multi-hit skill, making sure it hits the maximum animation speed is vital. Fanaticism helps with this goal tremendously.
Once you’re to the midgame, you switch to relying on Resistances and Holy Shield to prevent you from taking too much Damage while in a Zeal animation sequence.