I get mob bounce when the mobs tend to move around in fights (e.g. headless horseman).

On most boss pulls though - I head in with my main, wait until the mob settles into position, and then bring the rest of my guys in. Using the Ingvar example, I start like this:


Code:
  I = Ingvar
 
 
  M= Main
 
 
AAAA = alts
Then pull Ingvar:

Code:
  I 
  M 
 
 
AAAA
Then turn him around:

Code:
  M
  I
 
 
AAAA
Then hit 'interact with target' on the alts:

Code:
  M 
  I
AAAA