while in a war with another crew to kill the other crew's boss you must kill the whole crew first

Problem is, almost always, the CL has the biggest gun. So While you try and clear out the crew, He's picking you off as well.

also, We often try not to kill more people then necessary. I included especially non made men in that setting. This would require that all wars include substantial unnecessary bloodshed

So no, I'm 100% against this idea.