For WoE, your job is to tank and status. You'd want to pick up a +10 Sleep Pike and a +10 Stun Pike. Spear Boom enemies while walking with your guild. When facing a bigger mob, spam Brandish Spear with one of the pikes, and you'll see a whole lot of people stunned. You'd want to have as much defense and reductions as possible, for example, you'd want a Valk Shield.
For PvP, you could Spiral, but Pierce has a higher DPS without Bragi, but Spiral with Bragi is devastating. Spear booming HW with Brocca drops them fairly quickly. You could spear boom or Brandish HPs, Paladins, SinX, etc with Sleep pike to disable them quickly.
I don't play LK, so feel free to correct me on anything.