Here's a tactic everyone should use;
Think OUTSIDE of the box, be a step ahead of your opponent.
If you follow that statement above, you shouldn't need to follow any further instruction, you're destined to kill, so do it.
Don't sit around and look at the sky, complimenting how it's beautiful, KILL.
Quite simple, goes for real life war as well, seeing as I've seen some of the stupidest people permitted with a firearm sent off to war.
Though they ought to start sending murderers and those who have a sentence longer than the span of their lifetime, send em off to war again, they did in olden situations, whoever stopped that, whose name I've forgotten, deserved the death they've had, should've been sooner.