While aftermath is up 99 Cala > Rag (as long as Accuracy isn't an issue)

Ofc this is in very rare cases like 90 sec zergs were you can get tp before hand and some VWs in everything else ragna varys from beating it by a little to destroying Cala (40 acc is amazing).

Either way there both very powerful weapons but the thing that i'd say make Ragna better is 2 simple points... 1 WAR can wear it and since it's the best zerg weapon for WAR that means alot and that it's alot cheaper atm