Maybe I could have done more with Sac, but I seemed to do just fine with GoSup on fights like Council/Horridon/Tortos - fights that people in this thread think GoSac would be great for. Currently 3rd on Council, 3rd on Horridon and 4th on Tortos in ilvl 510 (512 now, but 510 when I got those ranks) (Normal only - my guild hasn't cleared normal yet ) - so I think the damage increase is negligible.