21 raises some good points,
* also with rapid fire weapons like the pulse & minigun & ripper try and crouch while firing, makes you a much smaller target and use those fast fire guns to mow down hallways, especially useful when more than 1 player is there.
* Be as unpredictable with your movements as possible while maintaining a good flow throughout the map.
* Im a big fan personally of lobbing those flak shells because you can get a pretty good measurement for distance after 1 shot and they have decent "splash damage" similar to the shock combo.
* A lot of players tend to load up on the rocket launchers alt-fire (Grenades) and dump them behind when being pursued, AVOID THESE AT ALL COSTS lol. 21 has taught me this the hard way!
There are many tactics and you should find which ones you prefer!
* If your not all to comfortable about getting up front and close with a player practice "escape tactics"
* Some people prefer to dodge like crazy while charging straight towards someone and unloading a full frontal assault on them.
* Some prefer actions like hiding in crevices, ledges and unusual locations you might have thought impossible and unloading shot after shot leaving you wondering with a sense of panic.
* Keep your head and your wits about you, the sooner you get frustrated the sooner you die. A Calm head tends to keep you alive alot longer.
* When it comes to moving around maps try & find areas where you can move well away from danger and boost your speed a bit.
* Jumping off elevators and dodging over to another ledge and back can really set me people off their game and in this game you need every advantage you can get.
* You can go anywhere but try to never take your eyes off the enemy, flak to the back is not fun

Speaking from personal experience there is A LOT of talent here on the Mountain & The Isle and years upon years of knowledge,
I have learned an incredible amount in my time here and I'm grateful for it.
Some people don't want to teach or take the time but it's truly nice when people do.
So keep practicing and ~Ch33rz!~ Were here to frag & have fun.