Cooperative Vs. AI Missions Give A Ton Of EXP.
Get A Buddy And Hop In There.
You're Looking At Anywhere From 20,000 to 50,000 EXP For A Win.
Note*
Co-Op Missions Are Also Affected By The Triple And Double EXP Events.
A Friend Of Mine Went From Level 20 To Level 50 On A Triple EXP Weekend; Just Doing Co-Op Missions -
Give It A Shot!
Good Luck!