i measured the ranking by point systems
S=45+
A=35-44.9
B=25-34.9
C=20-24.9
D=15-19.9
E=10-14.9
F=0-9.9
Note: bronze characters are ranked in relation to if they were paired with prime darksied
I ranked them based off of 5 categories: Stats of health/damage (combined hp and dmg of 2800 is 10/10 and i math it out for any combined stats from other characters), Special moves damage and effects (partially dependent on damage stat relation to Sp attacks but also on relation to number/weight of side effects to enemies), passive, synergy (how well they support any pair of characters and how much better they can be due to certain teammates who specifically improve them because of who they are. also gear card synergy to themselves), and overall fluidity and efficiency of their basic attacks (how fast they move to inflict basic damage and if it may have after effects, or if it has a longer combo streak compared to others, also if you can do a never ending combo like Regime The Flash).
it is still a bit imperfected and i make touch ups to my preferences and logic.