The odds are much more in your favor of having a good race running the outdoor 400! Compared to the 800! She's died a bunch of times in the 800. And I've never seen her have a bad outdoor 400
Also doubling at the 400 and the 4 by 400 is much easier. Why does everyone keep asking about the 800 and assuming she should run the 800. Her time seemed about even and she has much more experience now in the 400 recently!