If my PC wasn't potato,I should do proof with FRAPS,but cba..I hope that someone will add some proof in this thread,just if you use corruption,it heals on every hit as normal,but if you use corruption + malefic grasp,it heals with the same speed,instead of healing more often since malefic grasps makes the dots to deal instant damage = more hits = more heals..sorry for my bad english,but I'm sure you can test if and see that it's bugged,you have knowledge,I think I didnt explain very good,sorry for my language.instead of healing more often since malefic grasp causes the dots to do instant damage,it heals like i dont use malefic grasp,everybody can test it,if you want to test it with me, pm in-game on Puffyluffy(my warlock),but i think that you can test it and see it