Farming for Wizard body parts

[wotmania505]

I've been been killing giant ant worker at the base of the vine for a while now, and have collected only the left arm, the foot, and the torso. Does anyone have a time estimate on how long this should take, or if there's a better way to go about getting them?

 

EDIT:

 

Decided to try killing other stuff, and found the parts much fast. Teaches me not to try and farm one things... A note in the activity guide probably wouldn't be a bad idea, to keep others from making the same mistake...