Fractal
Low level fractals encourage the use of high-burst builds (as bosses can be defeated before mechanics have a chance to fully play out), but higher level fractals can use both high-burst or high-sustain DPS builds. Raid builds are also easily usable for in fractals, but due to the stat bonuses gained from fractal potions some builds are able to make adjustments to their gear to optimize their damage.
Guides:
BerserkerArmsTactics
DuelingIllusionsChronomancer
DominationInspirationChronomancer
MarksmanshipSkirmishingDruid
SkirmishingNature MagicDruid
ExplosivesHolosmithFirearms
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TacticsStrengthSpellbreaker
DisciplineSpellbreakerStrength
StrengthTacticsDiscipline
FireWeaverArcane
Great
ArmsDisciplineBerserker
Deadly ArtsCritical StrikesDaredevil
Deadly ArtsTrickeryDaredevil
ZealDragonhunterRadiance
SkirmishingWilderness SurvivalDruid
MarksmanshipNature MagicDruid
RadianceVirtuesFirebrand
HonorFirebrandRadiance
DuelingChaosMirage
CorruptionDevastationRenegade
CursesSoul ReapingScourge
SkirmishingWilderness SurvivalSoulbeast
FireAirWeaver
Good
FireAirWater
FirearmsExplosivesTools
ToolsExplosivesFirearms
ZealRadianceVirtues
DevastationInvocationHerald
ToolsFirearmsHolosmith
SpiteCursesBlood Magic
Wilderness SurvivalBeastmasterySkirmishing
MarksmanshipSkirmishingBeastmastery
CursesReaperSoul Reaping
ReaperSpiteBlood Magic
DevastationCorruptionInvocation
Blood MagicScourgeSoul Reaping
ExplosivesFirearmsScrapper
FireAirTempest
FireTempestAir
Deadly ArtsTrickeryCritical Strikes
Test
InspirationChaosChronomancer
ExplosivesFirearmsHolosmith
DuelingDominationIllusions
BeastmasteryMarksmanshipSoulbeast
FireTempestAir
FireAirTempest
Draft
DuelingIllusionsChronomancer
ExplosivesFirearmsHolosmith