Assault on Bronze Tomb is a King of the Hill type game. Each team takes a turn attacking the defending team, which has three rooms to protect till they lose. There are no points in this match, but instead it comes down to who captured the most rooms. If the captured rooms are equal, then it comes down to a tie.
For all the bugs in this warfront -- and there are bugs -- this match is pretty fun. In each room there are artifacts that can boost your attack or heal you. There are also sections that boost your movement speed, and room with two giant guns that kill everything they touch and two artifacts that will make the user invulnerable to all AOE damage.
It is a messy game, but you don't need to worry about any of the artifacts except for the big guns at the end. You do need to worry about traps. Did I mention the traps? Lets split them down per team, and what you will need to worry about for each one. And to make things easier, lets add two main directions: North and South.
As a defender, the best way to win this match is to keep control of the first room. Failing that, keep control of the second room. But since we are on the first room, you need to make sure that everyone in the raid is either a tank, a healer, or a support. Don't worry about DPS, since the entire purpose is to build the strongest high CC meat shield you can. You should always keep at least 3 or 4 defenders per side, and have the rest of the team move between the two points depending on how many people are attacking.
If you fail in defending the point, run to the next point and defend that one. So, team setup should be:
Tanks / Healers / Support. Don't worry about DPS.
The easiest way to grab control of the first room is to split the team into two groups. The first group is the decoy group, which is your standard group of players who are a mix of DPS, support, and healers. The second group is the stealth group, which would in the beginning of the match move to the enemy side in a straight line.
While the decoy group is attacking, the stealth side should remain in stealth until the side with the smaller player count moves to help where it is apparent that the entire enemy team is. That is when the stealth should come in, incapacitate the enemy players and steal the point. If you are on the stealth side make sure you don't kill the enemy players. The reason for this is simple. If you can stop a player from moving for 45 seconds and steal the point, it is better than stealing the point and having him respawn and waiting for you at the second point with his friends.
So team setup should be:
Movement speed boosting support, Rogue Assassins, Regular DPS, AOE heals (chloro builds help)