the only practical fuzzies for ragna are:
6D > j.D > jc j.A/j.C
falling j.C (from GH RC is best) > jc j.A/j.C
j.C works on most characters, but j.A only works on characters with tall hitboxes, such as tager, hakumen, jin, litchi, ragna, rachel (i think), hazama, and other people i can't seem to think of off the top of my head.