You can position yourself nicely behind a rope, and move your pet behind a rope to line of sight the mob, this way it cannot hit you or your pet. Thanks for the guide!
I find this pretty useless, since you can just form a normal group and say "First item Locked" (you always find idiots that join these groups) and after you got one item, just leave the group and form a new group.
Pretty easy to do.
Where and how can I still solo farm as a DK (with no bosses down)?