Thanks for the input. I had excellent success with the external fan in the first picture except when the idiot operator didn’t turn it on or off when he was supposed to 
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A more powerful middle cooling fan should help with heat creep but the problem I’m seeing is not heat creep, its a lack of part cooling causing the previous layer to not quite be solid when the next layer goes down. Those fans could also be replaced but I have multiple tool heads so that may not be the most cost effective solution.
This is an experiment with parts I already had on hand.