So,this is very aggressive tactic,with much higher defensive line,as mr Vujevic allways says,you need right players to play with any tactic.Focus on quick,high work rating attackers,with 11+ aggression,good all around DMs,and wingers with high work rate,crossing,off the ball,who can tackle good,and mark good,with some speed.I would reccommend use full backs or wing backs for that role,also,if you can find with jumping reach 10+ and taller guys,at least 1,8m,because if they win some aerial duels,your strikers will make quicker transition.That will be perfect,but you can play also without that attributes,you will get some good results with any team.My friend Babemocni did setpieces,and he is setpiece specialist for any FM,so you will score a lot off goals after corners and freekicks.I won with fulham title first seasson,and Babemocni testing with Leganes now,he will post results also.There is no big diference between this 2 tactics,King is more balanced,Killer is more attacking,you can play only one,or you can mixing both.