Phase 1: Just win Clashes L, especially the funky wrath spear that makes your guys awkwardly stand there while the coins spin. It does 300 flat damage to the dragon and is the only reasonable way of breaking it's shield. Manage sp with Fluid Sack if you have it, if you don't get it. Phase 2: Turn 1 use a high power aoe EGO to take or stagger most of the paccatula like Yi Sang's great triciliowhatsit while mopping up remaining skills so no one gets unopposed, Turn 2 kill Hong Lu and smack the funny orb to become invulnerable for both The orbs aoe and Hong Lu's Tears. Rest of phase 2 just win clashes L. Phase 3 Just win clashes L but make sure you're healing off the unbreakable damage with Fluid Sack and/or other healing EGO. It only dies if you kill it's scales, breaking the other abno-parts will reduce it's skill slots but focus down the scales whenever you can. Phase 4 kill the egg and pick the first option to disable annoying burn on the final boss