system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40K] Suppose for a moment that two of the Primarchs had swapped which planets their were swept away two by Chaos. What would be the most interesting combinations?

Say, Rogal Dorn ends up on Fenris and Leman Russ is found on Inwit, (Maybe Russ can handle the harsh environment, but Dorn might grow to hate the boisterous culture of his adoptive family).  Or maybe Horus and Angron had been raised in each other’s places. Which combinations would yield the greatest shakeup?
gpt
-The Khan on Fenris, so we'd get marines on snowmobiles

-Vulkan sent to Nostramo, to dispense justice but not the homicidal Batman way but through kindness

-Switch Dorn and Perty, just to see which falls to Chaos.