Daisy was more inclined to believe that Ego was a planetary consciousness. Perhaps he had lied to Star-Lord, or perhaps his memories from the time of his birth were confused and he had remembered wrong.
If he was a living planet, then his combat strength would be difficult to assess. She could only use Mogo the Green Lantern from neighboring DC as a reference. That Green Lantern was exceptionally powerful.
Daisy could destroy a planet. Judging by the power scale of Eternity's cosmic regular army, that should count as planetary-level combat strength. By the standards of reactionary gods like Odin, it would be Quasi-Celestial level. On some small planets and in primitive civilizations, calling her Skyfather Tier would be acceptable too. After all, Earth's Sky Fathers were far more formidable than those extraterrestrial Sky Fathers.
Destroying a planet in her normal state was effortless, but if that planet possessed its own consciousness and could gather its power together before channeling it out from a single point, that was an entirely different matter.
The gap between the two was as vast as the difference between a vegetative patient and a martial arts master. The course and outcome of a battle would be completely different; in a one-on-one fight, it was hard to say who would win.
Many novels mentioned Gaea consciousnesses and treated them as overwhelmingly powerful. Daisy believed Ego was a Gaea consciousness. He had even gone a step further from the state of a collective consciousness, becoming a super lifeform capable of independent thought, with emotions and desires of his own.
A formidable enemy! That was Daisy's assessment. Ego had left hidden schemes on many planets throughout the universe, including Earth. Killing him now served everyone's interests.
If he were allowed to keep growing, Ego would evolve further. Super