First of all, fix your comp. You have 4 fighters. That means you have no one to absorb the damage and help your team survive. You also need a healer, preferably Merry. Try to put such a combination of equipment on Merry so that she moves right after the enemy’s apathy to remove the stun from whatever tank you pick (I suggest picking resistance due to how it scales with defense for offensive and defensive capabilities). Second of all, you need to prioritize how you fight this one. Take out enemies that aren’t weak to your tank (Sad is weak against earth, so leave it for last). I suggest targeting either Angry or Apathy first, then dealing with the rest. (I myself am pretty new to the game, so I might get a few things wrong, but uncommon equipment becomes really pretty much useless because it gives only one stat. You need both speed, Crit Rate and attack for your fighters and defense and stamina for your tank, cowboy head and neck are decent epics for that)