I've noticed a trend with missions where they either lean towards more money of more XP. What missions have you found to be the most rewarding? I'm currently level 27 and in a crew of only three people.
-Survival missions pay out 20,000 is you survive the ten waves, and the amount of kills you get usually pays out pretty well XP wise.
-Martin's missions are quick if your team is coordinated enough.
-Under level 20, Gerald seems to have the most action packed missions
-The racing level "taking off" can be run solo in under a minute for quick XP, but can get boring very quickly.
What else have you guys found to be the best way for money or XP?