Power Reaper is an easy build to learn and play. The build has good burst, a lot of skills that can CC, a very large cleave radius, and strong 
Vulnerability application.
Whilst Power Reaper lacks single-target damage in most situations, its strengths make it useful for encounters with split phases and multiple adds. That is, the potential for generating Vulnerability and the large cleave area allow one to swiftly destroy adds.
Most of the damage from this build comes from being in and stacking up your ticking DPS skills like and . This is due to the multitude of modifiers you have for .
Power Reaper is beginner friendly, in rotation and gearing, however will require some serious 
Life Force management. You also can adapt your build easily to take different utilities when required.
Weapon Swap
Weapon Swap
Under 50% health the rotation changes slightly. When you swap to Greatsword you only need to spam and finish with into as usual.
You can before the end of the animation of has ended. The damage ticks at the start of the animation. This will let you get in an extra when you eventually get back to Greatsword.
You can Weapon Swap earlier than you think when using as the cast time is very short.
You can also swap out for to get more burst.
Reaper Power