Entropy 11

Wave 1 (Boss Wave)
Two Lunatic Beelzebub (Fire Resist & No Enrage). Largely ST attacks, that become AoE as the monsters lose HP. They have the ability to dispel generic buffs and inflict confuse. As they lose HP, they will get more aggressive, doing all of the former attacks AoE. They also use an AoE BRV+HP attack so be wary. Having a tank and a healer largely removes the threat from this wave. Debuff Inflicted: Confuse

Wave 2 (Boss Wave)
Lunatic Rafflesia (Stone Resist). This wave is the least threatening of the bunch. Its only HP attack is only ST. Getting broken by its Tentacle Knock gives it high turn rate, but it should not be an issue if you run a tank. Its AoE BRV Attacks inflict either Confuse, or Poison + Sap + Venom (HP Poison). Later on, it also increases its ATK, DEF, SPD, iBRV, and mBRV stats.

Wave 3 (Boss Wave)
Two Lunatic Deathgaze (Fire/Holy Weak,Thunder Resist & No Enrage). The most difficult to navigate. You may summon here if you get in a bind. Attacks are all ST except Poison Nails which is an AoE BRV that inflicts Poison and mBRV Down. They can remove generic debuffs, inflict instant break and trigger a follow-up HP attack if their current BRV is at least 50% mBRV - so getting broken can be a death sentence. Lastly, be careful of its hard hitting BRV+HP attack. Similar to the previous waves, having a tank largely removes the threat from this fight. Debuffs Inflicted: Poison, mBRV Down

Wave 4 (Final Boss Wave)
Lunatic Atlas. Avoid getting broken as some of its punches have high turn rate and can get you killed. At the same time, when it is targeting ALL, do not get broken too because: 1) It can either inflict debuffs which will make it more difficult to break Atlas. 2) Its AoE BRV+HP attack can be devastating. Tanking again, helps alleviate most concerns here, just be sure to heal up after taking damage as Atlas can catch you off guard. Debuffs Inflicted: ATK/mBRV/iBRV Down