Well, there is the pull.. which slowly pulls the mobs in and eventually draws them in fully and keeps them kinda floating in the air for a sec, basically from here you have to get used to when to use your knockback. You only have a short period slightly before and after the knockup period that they will actually get…
The knockback has to be done a split second before the singularity's knockup explosion, its a matter of timing, and getting used to it. First time I did dracolich i failed horribly, like 4-5 knockbacks in a row... luckily we had two really good clerics who could handle the huge clusterf of mobs until i could get the hang…
Put the companion in Idle, drag the companion to the auction window where you put stuff for sale and you will get a question to unbind the companion for 60k~ AD. I have not tried it so I cant say it works 100%.