I've been playing DH for a bit on Beta now.
early game, up to level 13 (what we have in the beta) DH has very little AOE. VERY little. All the other classes I've played have both, yet DH does not. I'm assuming later skills and runes will help this. But right now, caltrops and the bola shot are the closest things to an AOE build, and those are slow effects. They are not instant explosions like you can get with Monk, Wiz or Barb. You are not going to surprise a group with a DH and blast them to bits. You are going to sneak in, drop a caltrops, and then try to hit with an explosive bola before running away and firing at individual targets. try not to get surrounded.
again, i'm hoping later skills/runes changes this a bit, as it seems like a very 1-dimensional character right now.
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