Heal Troubadour Rifle / Sword & Shield GW2 Troubadour WvW Builds
Troubadour is the Mesmer that heals. 
Wandering Minstrel pulls out the clone economy entirely: you build notes instead, the shatter bar becomes Instrument skills, and you get access to Tales.
The Tales are the support. With 
Raconteur slotted every one of them heals nearby allies and grants 
Protection on top of what it already did — 
Tale of the Second Scion rejuvenates and raises incoming healing, 
Tale of the Honorable Rogue is a burst of speed, 
Tale of the August Queen hands allies distortion and chaos aura. 
Crescendo is the payoff: instruments you left playing in the background feed its amplitude, and 
Life of the Party turns it into boons for everyone it touches.
Our one Troubadour is a Giver's and Minstrel's zerg healer with no damage in it, running Rifle with Sword/Shield. It is the Mesmer support to bring when the squad is taking pressure it cannot heal through. When the squad instead needs 
Stability and a block window, Chronomancer is the other Mesmer we keep — it brings the same 
Mantra of Concentration, plus 
Well of Precognition and 
Time Warp.
1 Troubadour build
Heal Troubadour Rifle / Sword & Shield Playing Troubadour in WvW
The mechanic to learn is notes. Out of combat Wandering Minstrel gives you one every ten seconds; in a fight 
Harmonize gives you one for each phantasm skill you use. Instruments spend those notes, and the more notes an instrument eats the longer it goes on playing in the background, where 
Symphonic Resonance keeps it doing something for you.
Crescendo then cashes in everything playing at once. 
Altered Chord lets your last-played instrument take the spotlight and shape it — and playing an instrument refunds part of Crescendo's recharge if a note was consumed, so the loop feeds itself. Bank notes, spend them on instruments, fire Crescendo when the push lands.
What that costs you is that almost nothing here fires on its own. Raconteur's healing only happens when you press a Tale, and Tales are on utility cooldowns. Get caught with no notes and Crescendo is a small button. And the spec brings no Stability of its own — the one skill that gives allies any is Mantra of Concentration, which is why it is in the build.