I have always set mine up with pretty much the same choices on a smaller scale of the adults. It has worked fine.
As for high temps. being deadly that would be more ambient temps then basking. A basking site is only one area that can be gone to or away from. If your animal does not move from that spot when it needs to then the rest of the cage has something wrong.
A healthy animal will go to and leave that area as needed. If you have the entire cage heated to high it can quickly kill young and adults.
The first and foremost step in keeping reptiles is to learn they thermoregulate and what all that means.
I do not have all of my monitors setup with the exact same temps. or basking temps. I go by each individual monitor.
Hope this helps