A Storm is Coming
Aldrich watched the battle progress with all the poise of a seasoned general, standing calmly with a hand touching his chin in contemplation. He did not divert much brain power to the left side of the battle because Valera managed it, and he trusted in her enough to keep her bloodlust down to command his troops.
Thus, he kept his attention mostly towards the right side that he was largely responsible for with his fifty fishmen.
So long as [Burning Agony] was active, the flaming undead fishmen were utterly untouchable, but when [Burning Agony] ended, leaving the fishmen into lower leveled skeletons, they became relatively defenseless.
Single strikes from tougher fishmen such as the green scaled brutes or the crabmen shattered his skeletal fishmen with ease.