At first I tried a regular Full BM with Aimed Shot build. I had good burst but our team didn't have the CC to pressure the other teams. The next build I tried was a Marksman PvP build and was frustrated with how much CC came my way (which made it difficult to damage & CC others at effective times).
The final build I tried was BM with Aimed and Scatter Shot. In the beginning of matches I was able to CC perfectly under the affects of Bestial Wrath (Scatter / Trap). Not only could I CC effectively but I could also burst when their healer was in that CC. This is what the build looks like:
BM / Aimed / Scatter (44/16/11)
Most likely this is the build I will use in 3v3 next season. With it I end up using a Wasp to help in killing off Rogue teams. With 3/5 Frenzy and no Cobra Strikes a Cunning pet is really out of the question, Ferocity is needed for the extra crit chance.