Single-target damage is a defining factor in how well a weapon attack build can handle bosses in Path of Exile 3.26. Focusing on skill links, weapon choices, and supplemental tools ensures your character can deal consistent damage against bosses and pinnacle encounters.

Core skill gems like Heavy Strike or Bladestorm are excellent for high single-target damage. When linked with Brutality Support and PoE 1 Currency Melee Physical Damage Support, these skills achieve high physical output. They are reliable choices for dealing with tanky enemies.

Adding Ruthless Support provides another boost to boss damage. Its every third attack mechanic synergizes perfectly with slow, powerful hits, enabling large bursts of damage during extended fights.

For additional offensive support, Vaal Ancestral Warchief provides a damage buff and deals supplemental damage itself. Combined with Blood Rage to generate Frenzy Charges, the total single-target output can rise dramatically.

Weapon selection is critical for boss fights. Two-handed weapons like axes or swords often provide higher raw damage, while one-handed setups with a shield offer more survivability. Prioritize weapons with high physical DPS, critical strike chance, and attack speed for maximum performance.

Jewelry choices should enhance accuracy, critical strike multiplier, and flat added damage. Amulets and rings with increased physical damage and life leech make extended fights against bosses more manageable.

Flasks should be tailored for boss encounters as well. A Lion’s Roar Granite Flask increases physical damage and provides PoE Currency knockback, while a Diamond Flask improves critical strike consistency. These situational flasks are vital for maximizing uptime.

Overall, with the right gem links, supporting buffs, and carefully chosen gear, a weapon attack build in 3.26 can scale its single-target damage to efficiently take down endgame bosses.