This was a timely bump, and I am not at all ashamed to say that this glorious guide is one of the first things I thought of this past week when the Cloud of Darkness high tier and Null gear released.
NEW SHOOTING GEAR, PEW-PEWLADINS!
Null Loop (Neck): Racc+50
Null Shawl (Back): Racc+50/STP+7, absolute no-brainer
Null Belt (Waist): Racc+30
Shawl is a definite addition to your midshot sets. Loop's Racc is very strong, highly likely worthwhile (but maybe you're a badass and cap Racc every time you walk into a fight). Belt is a little less of a Racc increase (Racc+20 and STP-4 versus Reiki), probably making it into my midshot set.