Accuracy of bone influence (rigging/weighting) I'd like to find a process or a tool so that I can :


Place bones to define their influence precisely so that an automatic weighting will be ok
Report their influences to another bone, as i dont have the choice of the final armature


For instance, is it possible to define children (and deform) bones and report their weights to their parent after the weighting is done ?
What you're describing is convoluted and without purpose. 

With that in mind the closest thing we have is 'Envelope' bones.

Where in its bubble defines influence. 





The only bones that have weight are deform bones.