Say you have some nodes in a subnet, and a target geometry

Without doing any modifications to the subnet, i.e non intrusively, how can you get a set of values for each parameter of each node in the subnet, or of only a subset of the parameters / nodes, that minimizes the distance to the target.

Does it sound like a good task for APEX, Attributes from Parameters, Invoke Compiled Graph, and a bit of metaprogramming to handle the computation graph from AFP ?