Power Conduit Spear / Greatsword GW2 Conduit WvW Builds
Conduit is the Revenant's newest elite specialization. In a zerg we run one build on it: a power damage melee package on Spear and Greatsword, Berserker's and Marauder, 
Scholar runes, with 
Legendary Assassin Stance and the spec's own 
Legendary Entity Stance filling the utility bar.
The line runs on affinity. 
Conductive Armaments grants affinity when you use a weapon skill that costs energy; 
Expanded Consciousness converts affinity into healing and endurance, and into energy once you reach maximum. Nothing in that is a damage multiplier — the damage is the profession's usual Devastation and Invocation core, and the elite line's own contribution to your numbers is the minor 
Bolstered Bonds, which is a stat bonus based on the legends you have equipped.
What you buy with all that is a damage build that refills itself while it fights, and that keeps its dodges. That is the difference from Vindicator, which spends endurance to deal damage. Bring Conduit when you expect to be in the enemy's melee and want a build that does not have to choose between hitting and surviving.
1 Conduit build
Power Conduit Spear / Greatsword Playing Conduit in WvW
The mechanic lives in the minor 
Enigmatic Connection: it hands you Legendary Entity Stance — Razah — plus Cosmic Wisdom and Release Potential, both of which change with the legend you are currently on. You gain affinity from legend skills, more of it above the threshold and while channelling an upkeep skill, and affinity is what Release Potential scales with — on Legendary Assassin Stance it is three expanding shockwaves that immobilise anyone caught by all three.
Cosmic Wisdom is the window everything is timed around: it empowers your legends briefly, and 
Enhanced Embodiment both shortens legend invokes and extends Cosmic Wisdom if you invoke inside it. The minor 
Numinous Gift improves the third minor of your other two lines and grants 
Might and other boons when Cosmic Wisdom fires. So the spec rewards a player who keeps a loop turning — spend energy on weapon skills, bank affinity, invoke inside the window — and gives very little to a player who stands off and autoattacks.
Razah's own bar is entirely self-directed unless you pair it with the right legend: 
Shielding Hands heals allies only alongside Legendary Centaur, and 
Gladiator's Defense shares its boons only alongside Legendary Dwarf. Our damage build runs neither, so Razah is a stun break, a self-heal, a cleanse and a shadowstep, and the only thing the squad gets from you is 
Spirit Boon's boons on invoke. That is where the spec struggles: it looks after itself very well and nobody else.