This boss isn't really that hard. You can go in with assault rifles and riot gear and beat the boss with 7-10 players. Bring a ton of bullets and healing brews because the defense units do a good amount of damage. Rockets will take out the overseer super quick. Also bring fur gear because it gets cold in some parts. 3 sets of everything are a must in fighting the boss and units. Thank you.
Good job you made it this far and if you're on a PvP server I'm surprised you haven't been killed 50 times the epic final boss of the Island ring AOE weapons for the drones if you have any tech with him they're free walking element not free but you get me just use rocket launchers on the specimen implant it is walking specimen implant not the overseer
If you are an admin go into Creative mode and grab the admin blink rifle and switch to destroy mode and enter the overseer arena. Step into the cavity and the overseer should start to form. Wait for about 1 minute. The drones will start to appear and you shoot the overseer with the admin blink rifle that is switched to destroy mode. When the overseer 'dies' There should be another boss.
You need tek gear and I mean like two sets and a spino/rex/therio whichever you prefer only a 70% they will die tek is needed the minions drop element and their you go endgame acheieved now beat the other dlc for moar story.