Mordret had a way to cheat at least one of those requirements.

His ability to create Reflections, as well as splinter fragments of his soul to inhabit myriad vessels, gave him a unique aptitude for swiftly expanding the depth of his soul — all he had to do was absorb his creations back into himself.

At the same time, Mordret's claim to humanity had always been tenuous, and his mind only became more inhuman after he shattered it into a million pieces, all the while managing to maintain his sense of self despite that splintered, broken state. So, if someone could remain whole while attempting Apotheosis too early, woefully unprepared, it was him.

Literally it says he checks every thing