Nah those dots do not work. If you use all your dots and fester after that, you notice your fester will hit 0 because of dot limit. The best way is using titan egi and spam ruin + energy drain and u can probably do more treat than any other class and easily get max rewards from the big bosses. In syrcus tower just do same without titan egi. Problems usually start once healers put their dots especially if there is many scholars that have 4 different dots on the boss.