It seems to me that the ego has many positive attributes and even if it was possible for it to be destroyed, I'm not sure that would be healthy. For example, skills that the ego developed to further it's own superiority can but to use in service of something greater. The ego is what is used to develop most of our skills. Perhaps it should just be put in its proper place.
Quite so. The ego initially serves the purpose (unknown to itself) of integrating the personality - thereby making the personality potentially useful to another (higher?) intelligence.
When (if?) that higher intelligence approaches, the ego uses long prepared defenses and strategies - for example the ego explains that no higher intelligence exists.
Eventually (lifetimes later?) the ego admits that it is not the supreme intelligence and agrees to cooperation with the greater light. At this point the creativity of the ego can be directed towards the greater good.