Scenerio 1: Votto doubles. Phillips doubles. I would give them 50/50 credit.
Scenerio 2: Votto triples. Phillips SF. I would give Votto more than 50% credit.
Scenerio 3: Votto singles. Phillips triples. I would give Phillips more than 50% credit.
There's all kinds of gray areas in between.. but in general, I think the credit should average out to about 50/50 between the table setter and the RBI guy. I know a lot of over people disagree.