Use Rex Raptor's skill, Titan Showdown, to surprise the enemy after they've dealt around 2k damage to you. Double Summon Shadow Delver or surprise the enemy with Arrivalrivals + Cyber Tutu. Ready your allies for battle with Bashing Shield or Mask of Brutality. (Optional: Axe of Despair) And secure your strike with Ultimate Providence or Madolche Tea Break. BAM! Instant 4k damage.