First of all Conquest has never work for 1 of the 65 people in my friends list who play.
All my stats have deleted 3 time and im still at zero.
Error CE-34878-0 IS rampent and will even toss you out of the campaign.
A corrupted save message comes up and tell yoi to delete, you do and it just re corrupts itself.
Im at the point I was at when I bought it.