There is none. You dont need any Isolation.
If your have upright row, shoulder press/bb press, incline bench press and bent row in your work out, then you are working the whole of the deltoid system and you dont need any isolation.
You dont need to have that all in one workout, but as long as you are doing every angle once a week then thats fine.
You use your shoulders in almost every lift in the gym, so its really easy to overtrain them. Dont take the risk by doing latural raises, your not gonna get much growth out of it, you'll just add to your recovery time.