Since the new 2.6.4 Patch and the many changes to set bonuses, I'm sure many players will be looking for a Seeker of Light build aka "Hammerdin". The set bonus was buffed from 2000% to 12000%. After some tests, this build is now superior to the standard Condemn build that everyone has adopted the past couple seasons.
This is a solo build and not meant for group play. Unity is needed for survivability for this build.
How to Play:
You want to lead with Falling Sword because that's where your burst damage comes from. You can do one of two things depending on density or if there are elites.
If there are no elites you can gather some trash mobs by circling around them so that they are centered. You want to jump right into the center with Falling Sword and channel Blessed Hammer while using your defensive buffs whenever they are up. I would save Akarat's Champion for elite packs.
If there is an Elite pack then just focus on the elite. Use Falling Sword right on top of the elite and channel Blessed Hammer. Pop Akarat's Champion + Provoke + Laws of Hope. Lead with Falling Sword every time it's off CD and keep your defensives up as much as possible.
If you're low on Wrath then use Justice to replenish your resource.
Rinse and Repeat.
Edit: This build is actually viable with zmonk to provide heals/damage mitigation while stationery. You would switch out Unity with CoE or Obsidian Ring depending on what's cubed.