Many Extraordinary individuals who were accomplished in combat often claimed that diverse and erratic powers would never compare to those few but specialized. It was similar to the thought that a thick wall of spongy cakes would never hold up against a single adamantite longsword.
That notion was certainly not wrong: in the case of a Mind Flayer at High Gold-tier which had consumed the souls of dozens of thousands of people fighting against a clergy who was only Low Gold-tier, the former would certainly not be the one with an advantage—the latter's purer strengths would inevitably break down the strong but hollow attacks of the former, with basically no exceptions. That was because when it came to the former, it was already difficult for them to not go berserk, much less control their strength, while the latter would only need an undead purification spell to directly trigger an implosion of the former's power and have it self-destruct.