RPS Alignment Help

[[Pa...]]

Hello Zeiss Community!

Trying to set up an RPS alignment, and this drawing is making it difficult.  From my limited knowledge, the proper way to gather the points is to use a point set measurement.  However, two of these points are over bores, and a third point is actually a symmetry?  I am unsure how to gather these points in a way that is best practice and repeatable.  

Another thing I thought of was to maybe represent these datums as a Plane/line/point, using the features, instead of a true RPS.  Not sure what the best move is.  

Images attached.  B2 is over another hole, just in the X=108 direction.  A1~A3 all make sense, C confuses me, I think it's a symmetry point?