For all you that keep saying the same thing "Camp the tac insert, it's a free kill", "It's so easy to find it anyway" etc. i don't think you really got the point of this thread and why tac insert can be so OP.
If not this, then it would be the EMP nade...playing solo does tend to make the spawning suck...seriously though any nade bullet hack stomp fart will take this out. All good players use tacticals like stuns, flashes, emp. I use this on KC and TDM too, it doesn't matter what the mode, if you are smart you will always beat the Tac.