Before we get started, I want to say that there is a reason why I am not recommending stuffs like Armor of Medusa(Autocast Triple ATK) and that is because THEY DEAL 0 DAMAGE and it will cancel normal attack. Thank you.
I noticed there are a lot of new players that don't know how to kill the Asterius, Ozma, and Goddess Valkyrie.
Now I'll share a simple build to do a decent damage so we can all be happy farming our tokens, reborn essences, dark matters, and blacksmith's blessings instead of getting nothing at all when it doesn't die.
Please remember that it is important to KEEP attacking! AVOID luring the boss and get your healing items ready!
My recommended class as a new player is Guillotine Cross(yeah because of easy access to two elemental swords) BUT you can also apply this setup to other jobs.
Please note that this build is full of autocasts because Asterius(world boss) is considered a plant-type monster where you can only deal 1 damage.
Also please remember that I do not know how the script works and will only base it on my experience.
VERY IMPORTANT (Break HP Limit Items)
► Show Spoiler
TOP HEADGEAR
► Show Spoiler
► Show Spoiler
► Show Spoiler
► Show Spoiler
► Show Spoiler
► Show Spoiler
► Show Spoiler
► Show Spoiler
► Show Spoiler
COSTUME MID HG
► Show Spoiler
COSTUME BOT HG
► Show Spoiler
EXTRA STUFFS I USE FOR SURVIVAL
► Show Spoiler
Don't use more than 1 of the same card (like 2 Gazeti Cards for example) since I honestly don't know if they stack but most probably they won't stack.
ANYWAY..
I hope this helps lessen the failures in world boss sessions especially during 3am and 6am runs.
Also if you are a ranger that can survive from the damages by healing it off, you can avoid walking around and just keep on attacking since by moving around lessens the DPS and might risk you failing in world boss.
You can apply this build to other jobs like I said earlier, you just lose some autocasts but it still works. Like for example a sniper with Double Bound, Clown with Bass/Electric Guitar, and Gypsy with Electric Eel something like that.
BEST OF LUCK!