I formulated a beginner team strategy for this dungeon after a quick chat with viewer "tanaka7349" in the comments of a different video. Thanks Tanaka for the inspiration!
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Strategy:
1. Find a place to stall so you can charge your Lucifer friend's skill! This is very important!
a) Lucifer's skill must be charged before you proceed to the 5th and final wave or you will have a much harder time defeating the bosses.
b) Echidna's skill should also be charged by the boss stage!
c) The Jewel dragons are the best monsters to stall on! make matches of colors you don't have!
2. On the boss wave, target one Carbuncle (the one with a shorter turn cooldown!) and use Lucifer. Then pop Echidna's skill and finish off the Carbuncle you popped Morning Star on. If needed, pop Rainbow Keeper(s) for added defense.
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Team:
Vampire Lord leader, Level 37, Max skill
Rainbow Keeper
Dubmythlit
Rainbow Keeper
Naga, Max level, Skill level 5
Lucifer friend leader, Level 94 +146
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