Most of WD are currently using this skill. And i had noticed that the bears charge spread depends on where you sent them. I tried few positions and found out if you send them on East or West side they will spread a lot BUT if you send them on north or especialy south side of your monitor they will run MUCH closer together and sometime even compleatly together so they will all 3 crash into the same elite you are trying to kill.
This might help a lot if you get a little practise with it. All you have to do is stand above the elite group and cast all bear chargers in south direction right into them and they will most of the time hit 2-3 even the thin elites like skeletons.