I've noticed that when I get closer and closer to level 20, I barely get 700 AP with an win on Unrated. Is there any better options like for example deathmatch or spike rush? Would those be better than just queueing Unrated?

For those who are unaware, if you are gonna try out a new agent please please try it in ANY mode but competitive. I'm playing 5 rounds in a row with people who have no clue how to use utilities from agents and in the end lose games and thus...