When your eye is on the podium, there is no room for compromise.
Truvativ's downhill-race specific Descendant crank uses the same bullet-proof forged, AL7050 aluminum as the Holzfeller crank, but in a second-shaving 858g package. That's close to a half a pound lighter than their Holzfeller crank without the wallet-lightening cost of carbon!
The cranks are nice, but I was not a fan of their bottom bracket. The way bearing preload is set relies on a cheesy plastic insert. Mine developed play a month in that couldn't be adjusted out. However, I see tons of these working reliable on other bikes. I replaced mine with a set of Saint's, which I like so, so much better.