Regarding ego-strength, this can be expanded into the entire hierarchy of the unconscious, i.e. some may have greater shadow strength, anima/animus strength, more wise old man/woman*, more Selfhood, more Self-transcendence (which has various divisions within it); though perhaps there is an underlying dimension of tendency to progress upwards on the hierarchy at a faster or slower pace, or maybe that some view the heavenly realms of upper self-trascendence as the point, and others view the point as the earthly realms of ego and body.
It's an interesting topic.
* while on the topic, I'm thinking of using the terms "the other" instead of anima/animus, and "the wise one" instead of wise old man/woman. What do y'all think?