He raised hover shot on the abdella during the video. If you watch you can see him shooting enough times to cap it. The whole reason he used Sarv at 60% was because he took off 40% of its HP bar with regular shots while building hover shot to its cap.
This completely dumpsters the bows utility on extended ranged fights like Arrebati. It's entirely too powerful to use if the enmity cap is going to be an issue. Although I suppose the darkness skillchain attributes are a deterrent to using it in that fight anyway. It'll be imposssible to use it for more than a minute or two with hover shot up before a tank loses hate and you get your face ripped off. Like Eiryl said earlier; dead rangers do zero dps. It is however a freakin amazing toy to use in generic content. I'd love to take my ranger out with it to random stuff just to fool around with an old school setup. I still have fond memories playing around with E-Bow back in the day.