Bo3 zombies is very boring for me right now but it has been a while since 2xp.
DE is a very good map to get a lot of XP on.I've started playing some pub matches on Der Eisen. getting into the feel and grind to get myself prepared for the new map but I still keep playing more gta coz there's no incentive for me to play zombies as it's not really fun when no-one's on the mic compared to gta lol.
I played alot when DE came out, but I've strayed away from it after ZNS. Some double xp would definitely get me back in the grind.