i would say just pick the one that u like the most :3 RAmar has the best ATA of the rangers and is more of a all rounder, RAmarl is the weakest ranger but makes up for it with highest MST and level 20 techs so she is good to have if your team does not have a force and she also has a unique handgun animation making them a little better at using them (idk if that is true but that is the case with HUcassy with daggers) RAcast like everyone says has the highest attack power of the rangers and can use traps but needs more ATA and more hit then other rangers and my pick for rangers RAcaseal she is has very good DEF and ok ATP and ATA better then the RAmarl so just pick who u think is right for your play :3 also idk if this is true or not but androids get a damage boost to Blizzard/Arrest/Chaos/King but they have a reduce devil and demon so just pick what is right for u :3