BoB is easier than Crips just due to actual activity i've found. I've hit rank 1 in BoB before just out of fucking nowhere.
Main thing with BoB is Invasions > Arena, despite the obvious things like possible chugging/ganks the people are generally worse and less tryhardy, you can catch some fucking awful PvE'ers by invading and they are free as shit. The arena is more fair ON PAPER, but that claim is really tested when you're approached by fucking "Goku_x_Havel_shipper56" with his soulmass and katana primed and ready.
Also yeah dragonbros 3 was EZmode but really not worth it because the rewards blow my fucking pee pee.