[quote=@vancexentan]
Yes I believe we should balance it on a case by case basis. In some cases it may even backfire miserably. I mean do you really want to force madness on Emperor Nero? 

Also wouldn't it be almost useless on berserkers considering they're already insane?
[/quote]

Oh wow, I didn't even think about Berserkers, lol. That's a very good point. I guess it'd make them "more insane"? Like, Mad Enhancement usually makes them incapable of rational thought, but they still know which things they need to smash. What if the noble phantasm deteriorates their mental state even further than their ME does? Basically, it'd make them even harder for their Master to control than they already are?