Tried auto battling dark rank3 with my light team and went surprisingly well with no death. Ate 1 raging overdrive but 4 of my units have over 10k hp so it survived with a slither and didn't have to worry about a 2nd raging overdrive before it died. Not sure about the other elements but I'll try on Monday. Sundays I run rank4 since I don't need to use any mats to initiate, which has become an issue for some elements already.
Also still yet to get a single SSR light accessory drop since implementation.