Favorite zon builds

I recently acquired my second, Last Wish Phase Blade for my A5 barb buddy.
I'm changing my vote to Physical Fendzon.

This zon rivals the zealot and Dream paladin when fully kitted out. The Dream paladin does more damage per strike in my testing but the zon is much- much tankier. My eBotD Matriarchal Spear combined with String of Ears and Andariel's Visage gives insane leech. As long as I'm poking with the stick, I cannot die. I run into packs of gloams with a bloodlust.

You want the Matriarchal Spear, aside from the +3 auto mod, the tight damage range scales incredibly well with Fortitude and level 34 Might aura. My mere 97-142 grows to ~7k-10k. Much greater consistency than any other base; The breakpoints are easily met.
I tried G-Face but felt that Andy's with a Fervor Jewel is better. Combined with LoH gloves, you can hit the highest Fend breakpoint for MS. And as a bonus, I can still use Atma's Scarab for Amplify Damage procs. Made even more effective in tandem with a Renewed Bone Break.
Use Gore Rider, Raven Frost, and another ring of your choosing. I like Dwarf Star for magic damage reduction and fire absorb.
I'm using Harmony on swap for moving between packs quicker but you could buff health with CTA and Spirit too.
Charms are mostly Steel Grand Charms of Vita but 3/20/20s would be ideal.

Besides some crazy Heralds and the occasional elite Moon/Death Lord, not much can dent my health.

The Jab/Fendzon is notably one of the game's premier Uber killers as well, with just a couple gear piece swaps.