You can slow as your approach hostile areas. Use conventional tactics only half of the time, come up with new ones as fast as people figure out ways to counter, try not to repeat a tactic over and over. Just don't be predictable. If it looks good on the outside, it's rotten to the core. Knowledge is power as the saying goes.
Most clans advertise their favorite strategies on their webpages and most have a battle record.
Play with a couple of them for fun, see what they do. If one guy is dense and always does the exact same thing, formulate a counter. One kill for you later on. Don't play this game asleep. Keep your eyes open and your gun ready.