It's from the same site I linked to earlier: http://kanican.livejournal.com/54373.html
And, yes, you're basically asking for a larger percentage base. If you'll note, moving Intimidate/Out of Sight to 33% effects instead of 10% effects has the exact same effect as your system.
ETA: And what's this about no WS other than Riot Blade going above 200? I have no idea wth you're talking about there. . .
