Whats your strat????

First you most know the map, thats the most important second if the enemy come and rush and won the round, they'll sure do the same, so just camp, wait, cover in case they use flash and then just jump and rush, you'll surely get 3 kills before dying, works better if somebody helps u. Or you can try to soround them, take them from behind and get more kills.

No, particular strat. Like playing soccer. you can predict what's going to happen and act upon that.