You're browsing the GameFAQs Message Boards as a guest. Sign Up for free (or Log In if you already have an account) to be able to post messages, change how messages are displayed, and view media in posts.
Get good with your starter weapon and go for head shots. Use grenades to knock down shields ect and one shot to the head will kill them. Also stick to the outside of maps and try to find ongoing firefights and pick people off. Don't rush in.