Thread: "New" upcoming game: Armor Blitz

It's primarily durability. I just added a massive HP increase medallion to one of my 3* M tanks and the repair time jumped up to over an hour, when it had been less than half an hour the previous battle. No rarity, level, or type change involved.

According to the reddit linked earlier exp gained versus oil spent stays pretty equal, so just do whatever mission you can complete quickly.