My favourite build so far is the bladedancer. Being able to knife the shit out of big enemies is so satisfying. Getting the fast twitch ability lowers your melee ability to 5 seconds so you don't have to stockpile strength. This lets you concentrate on intellect for your super and discipline for your grenades. Grabbing vanish and the quick movement perks let's you hide and run quickly. So you can easily close the gap between your target. And finally grab either the increased duration for your super. Or the vanish while crouching. Both incredibly useful. One letting you keep knifing people when you kill one of their buddies. The other is self explanatory. A great hunter build. Strike and raid based. Also really powerful is crucible.