Broke out the Shammy again last night and had a blast with it. I was running with Khitai Blues, T1 legs, and Final Say hammer and was still pulling some kills without any excessive death tolls. After a couple of respecs I settled on the following build.
http://aoc.yg.com/feat-planner?class=29&tpl=2422-05,2423-05,2436-03,2487-03,2420-03,2424-03,2425-01,2434-01,2441-03,2404-01,2427-03,2428-01,2448-01,2445-02,2444-03,2400-15,2412-15,2426-13,2446-15,2403-15,2408-11,2415-11,2413-11,2442-12,2447-11,2437-11,2435-15,2416-15,2411-11
I ran Ferral Growl and Maul for my AA's. This one will let you steal a kill from DPS classes occasionally when rampage procs at the right time.
For a less DPS/Kill oriented build that has slightly better healing/DPS I have run this build:
http://aoc.yg.com/feat-planner?class=29&tpl=2422-05,2423-05,2436-03,2487-03,2420-03,2424-03,2425-01,2434-01,2441-03,2427-03,2428-01,2448-01,2409-05,2400-15,2401-15,2412-15,2426-13,2403-15,2408-11,2410-13,2415-11,2413-11,2447-11,2437-11,2435-15,2416-15,2411-11
I would run the spirit tree AA with this build
One more alternative build for PvP with BR/IH:
http://aoc.yg.com/feat-planner?class=29&tpl=2422-05,2423-05,2436-03,2487-03,2420-03,2424-03,2425-01,2434-01,2441-01,2428-01,2448-01,2400-15,2401-15,2412-15,2402-13,2426-13,2403-15,2408-11,2415-11,2413-11,2447-11,2435-15,2438-15,2416-15,2486-15,2411-11,2421-11
Casters hate this one with the bubble and silence, but it depends on others to kill (without some lucky crits anyways).