I'd like to gather some common map setups and strategies into one thread so that beginners can learn how to win more games.
I'll start with Lockdown/Lockout since that's a common map. The diagrams used pictures of Lockout since I couldn't find as many screenshots of Lockdown.
There are two common ways to set up on this map: Holding the BR tower + library, and holding the sniper tower + lift tower. Basically you want to use one of these two set ups and let the other team come to you. Both of these setups allow for great cross firing angles.
[b]Setup 1: BR tower + Library[/b]
The BR tower is called out by levels: BR 1 is the bottom, BR 2 is the middle level, BR 3 is the top.
By having teammates on the BR tower and at Library, the enemy team will almost certainly spawn either at Sniper tower or bottom lift. I don't think they would spawn at sword if you have someone in library, but correct me if I'm wrong.
The guy BR 3 has eyes on most of the map. He can put shots on people at the sniper tower, top lift, and obviously top center if the other team makes a push. He can also move back and forth on that back ramp behind BR 3 to vary his positioning.
The guy BR 2 can help shoot the sniper tower, top lift, and top center. He'll also clean up any weak opponents that make it to open ramp, before they can get up to kill the guy BR 3. BR 2 is probably the best place for sword or shotgun if your team has one of those.
The guy in Library can suppress people at top lift, as well as shooting and grenading people bottom mid. If anyone makes it past bottom mid, he can also (from the library window) put a few extra shots on them before they get to open ramp, so the BR 2 guy has an easy clean up kill. Library guy can also move over to the sniper tower to get the new sniper when it spawns, while the BR 2&3 guys help suppress the enemies.
Finally, the guy at BR 1's job is to suppress a push from bottom mid. The guy in Library window can help crossfire anyone that makes it past bottom center.
The other team has to push either from the bottom or across the top center. As you can see from the diagram, your team will tear them to shreds with team shooting before they get very far.
[b]Setup 2: Sniper Tower[/b]
The sniper tower and lift towers are also designated by numbers. Snipe 1 is the bottom, Snipe 2 is the middle, etc.
This setup is also pretty good, although a little more cramped. You have the advantage of being closer to the sniper spawn, though. Final Boss used this setup in Team Slayer back in 2007 and it was pretty effective. If your team is set up like this, the other team will spawn at BR tower and Library and will have to attack either across the top center or bottom center, where you can cross-fire them easily.
You'll have two guys at Snipe 2 and Snipe 3. (Don't actually go all the way up to snipe 3, though, unless you're getting the new sniper rifle. Hang out on the little ramp area that leads up to Snipe 3 instead.) This is where your sniper should be if you have it. These guys can teamshoot anyone who runs across top center. It's probably a good idea to have a shotgun to kill anyone who jumps to Snipe 3 when the new sniper spawns.
Another guy will be positioned at top lift. He can hide in the corners and suppress the guys at Library and BR 2&3. He also provides a great angle to cross fire anyone who runs across the middle to get to the new sniper spawn. It's probably good to give this guy a close range gun if you have it, in case someone lifts up. I don't think the enemy would spawn bottom lift if you're holding top lift.
The last guy will be positioned at Snipe 1. He can either be where the plasma grenades spawn at the bottom of the back snipe ramp, or another great spot is at high elbow (circled in the picture):
As you can see, this has several advantages. It's harder for the other team to grenade you. It's less obvious so you have the element of surprise. You have angles on open ramp, the ramp between bottom mid and bottom lift, and bottom mid. Final Boss used this position for their Snipe 1 guy.
It's also possible to stand directly under Snipe 3, look straight up, and bounce a grenade off the bottom edge of the mushroom-looking thing to kill anyone sitting there waiting for the sniper rifle.
Here's a Lockout Team Slayer video from Meadowlands 07 of Final Boss vs. Carbon. It's a great example of the sniper tower setup.
Any ideas for a good Ascension/Zenith setup?