I made a mock-up config on how I would do a hardcore server, I think it has the potential to play much more hardcore like, where your life and your team/class synergy is more relied on.
I definitely think it would need some feedback and testing on how well it actually plays out especially charge times(I think they should be high, but still not too slow you can't use your kit). A lot of it is obviously inspired by etpro, but also trying to take advantage of some mod features that you would not see in etpro. May be missing some cvars/features I mainly just did a quick rundown of the wiki so if I missed anything or something seems off let me know, I can explain further my reasoning behind something or fix it.
Here is a list of what I thought relevant settings:
Spawntimes were not included as I feel they should be looked at depending on the map but I think a good point to aim for would be 17 24.
And here are the cvars, I did not include non gameplay cvars: