With current aggro range it's not too hard to kill them, especially sara--just stand outside aggro range of minions and kill them 1x1. Bandos I could do easily, Zammy was a couple kills, arma was considerably harder than the rest, sara wasn't too bad if your clicks are accurate. Clicking outside the room on the minimap (the blackspace) didn't make you run towards that, you just stood still. They're more challenging than previously, but still do-able.