During the military confrontation, Feng Yi didn't use much of his true power. Cangmu Ling, as an almost martial god, can barely match up to any magnate in the Free Port of Maraca, this was an outright shortcoming. Feng Yi's power is conservatively estimated to linger at the peak of Rank 1 or even beyond, close to the great realm of the real Martial God.
However, while confronting Gomez, he held back due to the fear of harming the local citizens. When he really goes all out, he should be a dreadful being. Except for that time he chased the Scorpio Organization irrationally and wasted most of his energy on the way, Eggy hadn't really seen Feng Yi lose his cool- well, perhaps not entirely true, he probably unleashed his true power when using the Flame Dual Slash.
