You havent stated if what you did actually works. My understanding is that its not possible to change gameplay speed via attribute modifier at all.
If you want shit to go really fast tho, refer to gamedata.ini and change
FramesPerSecondLimit =
30 is default, setting it to 60 etc makes the game go crazy.
However the second part of your question, pretty simple, Darkness and such is global modifier, if you want it to effect Heroes and Structures aswell, just change the filter in weapon.ini. ACtually rotwk might have it in system.ini
No, the fastgameplay does not work.
I changed the frames persecond as you suggested, but it only slowed down the load screens, not the actual game.
And I dont think I was clear re global modifiers. I want to subtract 50% damage from EVERYTHING. Is there a way to do that globally?