Hunter Tier 16 (T16) Set Bonuses

[MadMonk 154]

T16 2P Bonus - Aimed Shot, Arcane Shot and Multi-Shot reduce the cooldown of Rapid Fire by 8 seconds per cast.

T16 4P Bonus - Explosive Shot casts have 40% chance to not consume a charge of Lock and Load. Instant Aimed Shots reduce the cast time of your next Aimed Shot by 50%. Offensive abilities used during Bestial Wrath increase all damage you deal by 4% and all damage dealt by your pet by 2%, stacking up to 5 times.

[Huuhan 1]

Is the 4 piece worth getting for BM? I've heard both ways.

[Fouton 266]

Based on my understanding that Crit = Mastery = Haste according to the guides, I would assume there is no reason not to get the 4set at all. Of course I am not up to speed on Beast Mastery's subtleties, and I don't know the comparison you are making to make it 'worth getting'.