Depends on what level you are for what you'll use as you unlock more abilities as you level. But basically get affliction up on your target, force lightning til wrath proc, death field for extra dot dmg and then crushing darkness then more force lightning. Shock if you need to dps while moving. Overload to knock them back or off a platform. Electrocute and force speed if you need to get away. Recklessness is our only burst on demand CD, use it with force lightning. Avoid lightning strike, it's pointless. Use wrath on crushing darkness or chain lightning if you go that high into the lightning tree. Basically you're a dot sustained dps class glass cannon type. Keep your shield up and keep moving. Use LOS and objects to your advantage. You're a ranged dps caster, you gotta use positioning to your advantage.