IIRC its 48 fury every 2 minutes for the Felgaurd GoServ adding 20% to GoSup makes them about equal. I hope they just scrap current Demo GoSac and make you do more damage or more crit or however they balance out the other specs GoSac and increase fury you generate by X%. Or You while in combat you Generate 25 Fury every 10 seconds as the biggest downside was always the fury lost IMO.