Multiple main aspects rank revenant users—power, control, output, input, proficiency, revenant energy pool, and even Innate techniques.
Potential and Prospects:
A person's potential is merely hypothetical, and they're called prospects. For example, someone could be considered an S-Rank Prospect. But their current potential power and lethal capabilities are B-Rank. In short terms, don't expect a prospect to be the
Low Tier Users: E-Ranks and D-Ranks.
The weakest group of revenant users/rankers. These people are mainly known for being either the lowest potential threats or just an extremely or slightly below average Revenant Ranker.
E Rank:
The weakest type of rankers—even amongst the low-tier group. They are considered the bugs that are waiting to be crushed by those stronger than they are. Powers are often weak, frail, brittle, and utterly pathetic in every way of a revenant ranker.
D Rank:
These rankers typically have a better overall understanding of revenant, and a more useful technique. But they're below average at best, the lackluster consistency and depth of their skills and technique bring them down. Causing them to quickly learn at some point they'll fall behind. It's something almost everyone experiences in their lifetime.
Mid-Tier: C Ranks and B Ranks
Far more impressive than low-tier rankers, but rather than the techniques and power—this group is rather simple.
C Ranks:
The C-Rankers are fair, reliable, and overall a well-oiled fighting machine. They have decent mastery over certain techniques, skills, and even more advanced specialties than the low-tiers have. However, they are average at best. Nothing special and remains so. Their innate techniques seem good, but others soon realize that the middle class is neither amazing nor weak. They're a reliable tool that gets used and replaced upon seeing a new and better one.
B Ranks:
B-Rankers are more inspired to push forward. They have the techniques and skills to push past the average ranker. But they are above average. They have have no finesse, and are not able to push further due to their innate potential being limited. They have the same issues as the C-Ranks. Nothing makes them special.
High-Tiers: A Ranks and S Ranks
These groups of revenant rankers strong, fast, proficient, and quick to deal with almost anything to cross their path. The have the precision, and elite levels of mastery over several skills that took their entire life to master. But they hit a wall—an insurmountable wall that shows what lies above the top of the food chain.
A Ranks:
Elite levels of mastery, special traits, along with a strong innate technique. Their potential is far better than most. Their skills are powerful, and by far stronger than most rankers. If you fight an A-Ranker you better be prepared to fight against someone who has mastered the basics to an elite level unlike anyone else.
S Ranks:
Only a few 100 people are even capable of being considered "S Rank." They have abilities and strength that transcends normal limitations. And what makes them more deadly than most, is the fact they aren't like us. They're egotistical and cocky. And most S-Rankers even unlocked their 'Realm'.
Top Tiers: Captain Ranks and Transcendent Ranks
They surpassed even those who have transcended further than most. You can't place limits on these folks. They have extraordinary abilities. Ones that bend reality to their whim. Or even such destructive abilities that threaten even a single planet. There is no description for describing these rankers. They are strength itself.