What if you had a Brotherhood of Steel combat simulation chair that works kind of like the memory chair in the one quest you do for valentine. You can choose what kind of hordes of enemies you'll fight like super mutants, raiders, synths etc... And maybe have a couple options for terrain as well, and you can do wave after wave of increasing hardness to the point of ridiculousness. Where your fighting like 12 mirelurk queens or something.
You may not be able to get EXP for it, but maybe there's a score you could get, and share it online with your friends or something.
Just came to me today,