Rise of the Tomb Raider DLC Score Attack Prophets's Tomb 12018 points, 3500 credits

I find that this is an easier way to rack up some credits to buy the premium cards that I was told to have an infinite fire arrows to be used in Lara's Nightmare. I did miss one of the 5 challenges. I think it's a document in the 3rd water puzzle. So it could easily be 4,500 credits instead.