Mage/Dark Wizard Help Tank Build

Recently cus of the newly released LI I have tried to use a tank build which consists of Morph-Stardust, Hive Chest (why tf did I get this), Gemini, Leadlights, x2 Prisms, Squid Anklet and Royal Stormy Amulet. I finished it twice but when I tried doing it today with only 1 more person, I got OHKOed at the Idol thing with 50million lives. I realised that I take more damage from him than any other boss, including Death, Cybel and Dr Legendary. I need a new build cus if this keeps up I'm never getting past that guy

 

Prease guys help me ;_;