This zone can be reached with 700 AS distributed as 20/45/23/189/90 for an hybrid build and using two nog fishes. It can probably be reached sooner using more nog fishes and a proper leveled Borb (otherwise you will find a wall earlier), but it require testing. In case you're wondering what's a nog fish, it's a technique to extend your HZE after you encounter a boss you can't defeat while being active. When a clickable (the orange fish that rewards you with coins and sometimes rubies) appears don't click on it and stop clicking/remove the ACs. After one minute, the idle bonus starts and then you can click on the fish because Nogardnit+Libertas+Xyliqil will increase the gold you receive. With the gold obtained you can buy more of your guilded hero and return to active clicking.