Accuracy and End enhancements, with lots of ST attacks, so there is always one charged. Maybe a Recharge on the heaviest attack. Damage only once you have slots to spare. At least half your enhancements need to be End. Also fully slot your Stamina and take any boost powers early. Skip any ST attack with a long animation or with a slow DoT as its main damage (such as Arcane Blast or Gloom.)