Since mizer asked me about the improved mangle vs improved FB talent points, I decided to sim/calculate if it was truly the right choice to take imp mangle for LK instead of imp FB.
http://www.worldoflogs.com/reports/u...ses&boss=36597
Number of successful mangles = 55
Number of Clearcasting procs = 133
Number of energy-using damaging specials = ~850.
So number of mangles that actually cost me energy = (850-133)/850*55=46.
Amount of energy saved by imp. mangle = 46*6 = 278 energy saved in total.
With 10500 EDPS, and 35% of that white dps I do about 6.8k yellow EDPS.
Including king of the jungle/revitalize/etc i gain about 12 energy per second, so my EDPE = 6,800/12 = 570.
So the total dmg gained is 570*278 = 158k.
FB dmg is a bit easier to calculate: I did a total of 476,751 FB dmg. 9% of this is 43k.
So imp mangle is about 3.5x as good as imp fb on lich king hc.
Another option is to drop improved swipe for improved FB.
My total swipe damage was 2,968,118. Taking away the 30% from the talent would mean I lose 2,968k-2,968k/1.3 = 774k. So that's not an option