That just means u are soloing bad healers. To the OP, it should take 1-2 dps to kill a healer. You shouldnt be able to solo a healer nor should it take more then 2 dps. This is obviously circumstantial. Now there are really good healers out there who will kite you to Africa and back but that isnt common. If a healer such as a sorc has everything up (medpac, adrenal, bubble, phase walk etc.) then it could take 2 dps a while to kill them and thats assuming the healer is kiting, stunning, slowing, knockbacks etc as well. A healer isnt going to stand there and out heal 2 dps. Just isnt going to happen if the dps are interrupting and stunning the heals and know how to use auto crit abilities.