There are two main Best in Slots floating around. You will want to swap gear depending on certain situations. Swap between Genji and Augmented chest piece depending on if you have a Bard or not.
The difference between these two sets is down to 0.1% DPS, so choose whichever one you are more comfortable with. A thing to note, however, is that if you clip anything at all with the 512 SkS build you will be unable to get 9 GCDs under buffs.