antagonistic super set

super setting two muscles at the same time , i.e tris bis , so doing pushdowns and then curls  back to back no rest , i always thought it was a dumb idea , if i work two muscles ont he same day  i like to do one till its done then another ,  if i were to try this could i gain mass and endurence? depending on rep range i guess , and would i do this for every exercies , if i did 3-4 a piece per muscle would i super set say
 
incline curl  with rope pushdown
close grip ez curls with skull crusher
  seated db curl with french press?
 
or is that two much , seems good to me?. im just trying to bust this current plateau
 
thanks for any responses!