Kodak black, 21savage, kendrick lamar, slimjesus ,young dolph

Hello! I starter a new account. I want to upgrade one m2 turret straight to m3. My options are: Siberian kit(freeze) ,Tornado kit(rail) or Pitbull kit(hammer) . So what would be best and most OP? Freeze m3 at WO2 ,Railgun m3 at WO5 or Hammer m3 at third lieutenant? Let me know what should i do. (Yes i'm buyer) Thanks!