The maze hallways are devoid of TA spawns. Once you make your way to the ramp that leads to the room with TA spawn, the fighting starts. The main room has several levels with ramps. The different levels can only be navigated by SHIFT, because the ceiling is too low to get past. the 2nd room has additional TA spawns and Andralay root in a pool of water.
I expect this would be a very frustrating arena - with a massive advantage going to the player(s) who can establish themselves in the TA span rooms.
(same as Maze of the Minotar?)