Quote Originally Posted by Alhanelem View Post
Normally you just poke the adds while yiou burn the boss as fast as possible. When I run, don't have anyone specifically going after them. but we're talking well geared speed running. Ive done it before before being well geared and SR, its a little harder but SMN can do it just fine if he knos what he's doing. You don't dot them, you just run 2 them while running around. They don't have much HP. Lay down your dots on boss and use contagion, don't waste actions dotting the adds.

But really, just stick to well geared people, and zerg the boss. Bane or ruin 2 them when they get close. You don't need to (and don't want to) kill all of them, just a few between each rancor.
The problem with bane is that it is capped to 3 enemies. So, the description on the skill is misleading. A summoner can't spread dots to all the adds, specially, in the last boss with the exception of shadow flare.