This isn't necessarily the most popular or the most meta but these are the 10 builds from 3.29 that stood out....
Credit: pathofexile.com
1. Winter Orb Elementalist / Occultist
Playstyle: Fast-paced auto-targeting mapping with icy explosion chains.
Key Mechanics: Winter Orb received strong base crit and projectile buffs in 3.29, making it a top tier mapper and all-rounder.
2. Cyclone Slayer
Playstyle: Melee whirl-wind with high passive mitigation and block chance.
Key Mechanics: Stacks max block via Warstaff and leverages new Runegraft mechanics for mana retention and Phase Shift upkeep.
Guide:
Follow Ronarray
3. Kinetic Fusillade Totems / Ballista
Playstyle: Ranged totem placement with rapid projectile coverage.
Key Mechanics: High single-target shotgunning and safe mapping for bossing content.
Guide: Follow Palsteron
4. Strength-Stacking Juggernaut
Playstyle: Ultra high-budget boss deleter and T17 map runner.
Key Mechanics: Stacks Strength and Accuracy. Multiple variations including Heavy Strike, Molten Strike, and Static Strike
PoB Link:
Follow Ignatius for Static Strike. Follow Altek2k for Molten Strike. Follow ConnorConverse for Heavy Strike.
5. Ethereal Knives Ignite Elementalist
Playstyle: Screen-wide explosion mapping.
Key Mechanics: EK fired in all directions procs ignite which does screen wide wipes for amazing clear.
PoB Link: Follow Ronarray
6. Frostmage Mana-Stacker Hierophant
Playstyle: High energy shield spellcaster.
Key Mechanics: Uses the Frostmage Support to gain massive added Cold damage from reserved mana, combined with Sanctuary of Thought.
PoB Link:
Follow Jungroan
7. Endurance Charge Static Strike Slayer / Juggernaut
Playstyle: Auto-attacking movement melee.
Key Mechanics: Scales endurance charges to extreme caps for passive lightning arcs that clear whole screens while running.
PoB Link: Follow UberDan
8. Penance Brand Ignite Elementalist
Playstyle: Brand attachment with high-yield damage-over-time ignites.
Key Mechanics: Places brands on bosses and rare monsters for massive prolif burns across whole packs.
PoB Link:
Follow Goratha
9. Luminary Mercenary Support / Bot
Playstyle: Minion / Mercenary buff commander.
Key Mechanics: Flame Link: Leverages the new Luminary ascendancy and Flame Link to scale mercenary damage and light radius modifiers into game-trivializing stats.
PoB Link:
Follow CaptainLance9
10. Poison Shotgun Fireball Trickster
Playstyle: Projectile spam applying rapid poison stacks.
Key Mechanics: Uses Ephemeral Bolts jewel to overlap multiple fireball explosions onto single targets for exponential poison scaling.
PoB Link:
Follow Jungroan