1. Everyone focuses on getting control of RL area
The entire team should focus all of their attention on gaining control of the RL area in the first few minutes of the game. Why? If you control the RL area in the beginning of the game, your entire team will have RLs, and will likely have the YA too. The opposing team, on the other hand, will have no rocket launchers, or one if they were able to escape the RL area. This is obviously a sizeable advantage to have. There may not be any other time in the game where your entire team has good weapons and armor, and the opposing team has none.
 
2. Once RL area is taken, get control of Quad
The quad is a devastating artifact. An enemy with 200 armor and a SNG with quad can mow down anyone in a matter of seconds. Therefore, maintaining control of the quad is also of the utmost importance, and is definitely a high priority, and may well be the highest once the RL area is secured.
 
3. Use quad to protect RL guys until they are armored up and in good health.
With a quaded guy who has a RL sitting on the bridge, the enemy will surely stay far away from the RL area until he, or the quad, is gone. Thus, you should use the quad to protect the RL guys until they are beefed up enough to fend for themselves.
 
4. Use the next quad to clear out RA
Once you guys are settled in, and have solid control of the RL area and the Quad, it's time to expand your territory. Using the next quad, have the quad guy jump over (with quad) to clear out the RA area. The enemy team will most likely have some guys there waiting to get RA. Why? Because when you have the RL area and the Quad sealed up, there are only two places left for them to go; the SNG, and the RA.
 
5. RA guy backs up Quad guy when taking RA
The RA guy should jump over with the quad guy to back him up. The reason you'll want a backup is because of two reasons. One, they may have several guys in there who are already beefed with SNG and RA. They will make tough adversaries. Second, they'll very likely be prepared for the assault, so it's good to have at least two guys attacking.
 
6. RA guy stays at RA, Quad guy jumps back over
After the RA is cleared out, let the quad guy get the RA (since his post is at the Quad) and have the RA guy camp at the RA. RA respawns in 20 seconds, so giving up the armor to the quad guy really should not be a big deal.
 
7. Dominate
Now your team has control of the RA, Quad, and RL area. That leaves the other team with nothing more than the SNG. It's time to rack up the frags!

Next: Covering Each Other's Asses