Dude's using the 50% Chakra buff and editing his log before it's uploaded. That's the only explanation I can think.
...it's not impossible. He doesn't have a level 100 talent selected. You could keep the Chakra buff if you had it on you before they changed the exploit used to get it. (And level to 100 with it.) As long as you never change a talent (or learn a new one, which is why this guy isn't using a level 100), it'll never drop off. Seeing as a 50% DPS buff is more powerful than any level 100 talent, it's an easy choice. This guy is just editing the buff out of the log so it appears he's legit.
People suck.