device's AWPing style is the most likely to succeed. To me, Astralis's playstyle has always been about giving themselves the best chance of succeeding, not relying as much on individual performance. That's why I have some faith in this new 7 man roster, because I feel like a lot of the Astralis positions are kind of plug-and-play, basically anyone who is decently enough skilled (JUGi for example) can just hop into any of the positions and as long as they play it right, they will be almost as good as the real Astralis.
EDIT: Elmapuddy made a video called "You should AWP like device, not s1mple". s1mple's style is successful because of his individual skill, not that it's a good style. device is the standard, a style anyone can pull off and get wins.