Best place I found to actualyl camp this stuff is steamfont. You can get over there near the windmill as a semi-safety area. If you got tracker you will find the commanders are not too far from the windmill. I was killing them with my druid then me and my friend was logging all our alts on to equip them. Within Id guess 5 spawn sessions we had everything we wanted for all our charactors.
Each time I did this there was maybe 1 or 2 other people hunting commanders, and there was plenty of them to go around.