By SuperEagle: Drawn Joker for W/D resist. Wild card can be any devil. Get all skills ready before fl 9. Pop Sonia, Hamahime to turn all orbs to dark. Add King Baddie x3 Atk - OHKO all 3 dragons on fl 9. Fl 10 boss can't kill you as long as you can match 3 hearts for 2500 hp minimum. Wait for skills to charge and finish. Safe build.
By Railgun@PG: Save CDD for the 6th room, use its nuke, kill them 1 by 1, really simple... When it comes to the Boss, lucifer one time, if needed heal 1 turn if it isn't dead and lucifer again, if you for some reason used 1 of them prior, you always have echidna and 4x rcv
By herp_derp: Build i use to get through all my tier 5 last stages. Just make sure to take your time through the first 8 waves and be sure to have all skills up and around 75% or more hp. Use CDD, and dark dragon's orb change skills and combo nuke down the 3 dragons. If you blotch your combos, use batman/KR. fl10 gravity +HS = win.
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ttt: It's a shame that I don't know a simple rule but how can you get through this dungeon with your suggested group which only has dark group members?
I mean there are 4 more other balls to delete in order to go through this stage, right?
By butts: Use Ancient Light on tougher mobs--especially ones with ogres--and stall. Lv 9 pop all dragons and combo Raphael into Valkyrie. Lv 10 heal often and use archangel to help survive until you can use the same combo. Fully evo'd valk would give more HP.
By Lin失憶: Pay attention to make blood full. Use siren if needed. Max siren's skill if you can. Charge up before 9th floor. Use everything and charge up again before 10th floor. Use Gungnir 2-3 times and you can kill the boss
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*A44: Slow but worked good. Keepers weren't needed, maybe some attackers work better/faster. Thx!