Plunderstorm build
Firestarter
One of the strongest and most popular builds right now and it's clear why. Insane damage, great mobility, great control. Very difficult to stop.
Strengths
Incredibly strong and bursty close range damage
Amazing mobility to chase down enemies or escape
Great control with
Quaking Leap stun to close distance and set up a 
Searing Axe + 
Fire Whirl burst
Weaknesses
Burst damage can be countered with a well-timed
Lightning Bulwark