Power Dragonhunter Spear / Greatsword GW2 Dragonhunter WvW Builds
Dragonhunter is the Guardian that makes its virtues physical and spends its utility slots on traps. 
Spear of Justice hurls a spear that tethers what it passes through. 
Wings of Resolve is a leap that heals allies where it lands. 
Shield of Courage breaks 
Stun, grants 
Aegis and puts a blocking shield in front of you — and only in front of you; you are open from the sides and behind while it is up. A trap is ground-targeted and arms where you drop it, so the damage lands where you predicted the fight would be rather than where it is. The spec rewards reading a push before it happens.
Heavy Light is the trait the line is built around, and it does two things at once: disabling an enemy grants you 
Stability, and disabled, exposed or defiant foes take more strike damage from you. Your crowd control and your damage are the same button.
Underneath it is still Guardian — the same Zeal and Radiance damage lines that the Guardian melee build runs, with 
Wall of Reflection available on the bar. We run one: a melee power Dragonhunter that pushes with the squad and drops its traps into the pile. For the Guardian that carries the squad's boons instead, see Firebrand or Luminary.
1 Dragonhunter build
Power Dragonhunter Spear / Greatsword Playing Dragonhunter in WvW
The mechanic asks you to commit early. Traps arm on the ground and wait; 
Test of Faith punishes enemies crossing its ring with an unblockable hit that lands harder on a disabled target, 
Procession of Blades whirls, damages whatever set it off and grants you 
Fury. Both are cooldowns you spend on a prediction. Get the read right and the enemy walks into the whole bar at once. Get it wrong and you have nothing while the fight moves ten metres to your left.
The rest of the line rewards being in the melee anyway. 
Defender's Dogma charges Justice to full and shortens Spear of Justice's recharge when you block, so 
Shelter does double duty. 
Zealot's Aggression adds damage against the cripple Justice's passive already applies. 
Pure of Sight is the odd one out — its strike damage bonus scales with your distance to the target, and a melee Dragonhunter is by definition standing where it pays its minimum rather than its maximum.
Where it struggles is mobility on the other side. Against a squad that will not hold ground, trap placement is a guess, and a guess costs you your damage window.