The Reason EA disabled xp in portal

Farming XP in solo isn't quite that quick but it was pretty easy in breakthrough before they put the cap in place. I went from 25 to 50 in a day just by getting in a tank and moving to the spotter position and letting AI drive and kill things while I chilled.

Right now solo breakthrough is easy mode for getting attachments and vehicle unlocks. Normally rack up 150-200 kills a match on foot and as many as 300 in a vehicle.