Poison druid is good for cows and mappo and rift, but physical build is still faster.

If you want to run cows wear cerebus virus helm and kaluut armor. Other gear includes duel carrion rings (max rabies skills and -15 poison), LK boots, arach mesh belt, trang gloves, and the sword that gives +10 rabies. Ive tested rabies fully and reach 2.3mil damage over 32 seconds. Its enough to kill most things, but it kills slowly compared to the physical build. Its better for cows though, gl!