If you're looking for a quick getaway, go down or hang in there. It's not going to net you tons of kills, but you won't die often.
Also learn to run away. You notice people who are above average at this game know that there is a time to keep shooting and a time to run away, heal, and then live to kill another day, lol
I think it's a lot of luck to get a rampant....I mean, it can be so easy to get killed by some lucky quick boom or RPG that you never see coming....
However, I think you generally need to play smart and try keeping the action in front of you. Sometimes I'll run around the outside of the map...sometimes I'll just hang around a certain area of the map....And playing smart also means running away if you aren't in good position for the kill.
I do think smoke bomb is almost a must. I avoided that booster for a long time...But once I started using it, I started dying a lot less. Plus, if you have a smoke-bomb loaded and ready, it gives you more freedome to move around and look for easy kills knowing you can disappear in any second. Plus, with it only taking 7 medals, you can often use it 2-3 tmes a match...saving 2-3 deaths.