Pretty balanced stats, Recovery>Agility>Armor, about a point separating each. Depending on what I'm doing, I'll either be using your scatter grenade setup, but sometimes I'll switch to The Hunger and Embrace the Void for maximum grenadage. Paired with the Grenadier perk on weapons, you become the god of blowing stuff up.
For crucible I tend to go for all the vortex-y stuff, with blink and Surge for melee. It's scary how willing people are to run into vortex effects, I'll be running around only to get a kill because somebody ran into a vortex that I forgot about.
For gear either Obsidian Mind (what else?) or Voidfang Vestments for looking pretty. Raid finally blessed me with good Intelligence boots, so I've got 100% int with around 60% discipline, it works fairly well for me. For weapons I typically use Thorn with Bad Juju on the side for easy crowd control and super use.
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I like your grenade setup. I really only use axion bolts in PvP and I really love the scatter grenade, but I just find it very situational. Vortex nades are useful in pretty much any scenario. If you don't have obsidian mind then go for skull of ahamkara. I had it more a while and it makes all energy drain effects last longer so even more grenades. But really obsidian mind is the shit, if you have that then there's NO other exotic that can compete.