For me ive been using the same as before above 80% which is just aimed and steady, but after 80% i add serpent and use chimera every cd but still hardcast aimed shot as a focus dump. Worked for me so far.
Actually, it's still too soon to tell. There was a bit of discussion this morning on EJ about it.
There was a sim recently(http://simulationcraft.org/406-8/Hun...omparison.html) that used the SS/AiS duo in CA, and then switched off to AS as the focus dump unless under a bloodlust/RF type effect. In this sim, this lead to AS as a focus dump only being 82 DPS behind. One examiner of the sim noted that the ASdump build still had the AiS glyph in and not the AS glyph!