The soul prowler's method of perception has all the problems of the spiritual echo method including the short range and many other disadvantages. The soul prowler essentially has a sight disability. If not for the fact that it felt Legion-7's probing with the divine echo, then it wouldn't even know that someone was approaching it. Even then, it couldn't sense Legion-7 because he was too far away from it much less tell his position.
His divine echo perception technique outclasses this shoddy perception technique in every way. But Legion-7 still complained. "The divine echo method is still lacking. Even the lowest soul prowler will be able to sense me when I sense them."
