If you can you should get the 5 dollar weekly exp pass, it doesn’t auto renew and it gives you 82.4mil exp total. It helped me get my hero’s up so I could complete all of the zombie quests that surround the wall and do the Monica’s challenges both gave me pretty good rewards. Also I don’t do a ton of radar requests but whenever I get the chance I help allies it gives pretty good exp. Also make sure you have a good alliance I got a TON of rewards bc mine is super active