Gale (+Weapon speed). You need swing speed more than damage. Never use "Heavy" enchantment; it makes you unusably slow. Mantra Loadout (The "Ice Giant") Frostdraw + Heavy Weapon creates a "turret" playstyle. You freeze them, then you crush them.
Curved Blade of Winds (Halberd). It has extended range, a horizontal swing, and deals Slash damage, which few armors resist. best heavy weapon build deepwoken
Use Crystal Road liberally. The crystals block projectiles. Walk forward slowly. Do not run. Force them into a corner. One Curved Blade M1 catches their dodge, and the combo is over. Gale (+Weapon speed)
The build's only counter is a with a gale pike who never stops running. But in a direct fight? You are the king of trades. Mantra Loadout (The "Ice Giant") Frostdraw + Heavy
Go to Ministry . Get Frostdraw to 20. Farm the golems. You finally unlock Lumbering Slam . You can now kill a golem in 3 hits. Farm the Adret tribe for Meditation to swap mantras easily.