After all, there seem to be a very good DH template running on the PTR... It's a Chakram spammer, with 4P Marauder and 2P Shadow's Mantle.

Honestly I have no explaination why 4P Marauder + 2P Shadow's Mantle would do better than 6P Marauder, but still, this seems to be the new uber-template.

Something like this (chosen element and skill affixes needs testing) :

http://www.d3planner.com/176985338