Waxing in my opinion with plucking being the worse. I have my eyebrows threaded though as prefer the outcome.... but I'm a wuss for it, I find threading almost as painful as plucking.
Right depends on the area, if it was your eyebrows, I find threading the most painful! Plucking doesn't really hurt and waxing doesn't hurt that much and lasts longer. I'd go for waxing if I were you as it rips the hair out of the root (doesn't really hurt) and takes the longest to grow back out of the 3 options.