Cooling the whole print vs extruded plastic with PLA

Over the past few months I have been cooling my prints with a 80mm fan to avoid delamination. I am about to get my E3d Lite6 with its clip on cooling fan which means I will have the fan mount on my Wades Extruder open for a different fan arrangement. That being said should I print a ducted fan that blows exclusively on the molten plastic or continue using my 80mm on the whole print. Would the ducted 40mm fan stop delamination?

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Prusa i3 Rework - Ramps 1.4 - E3d Lite6 - Full Graphic LCD Controller

All you can do is try it out. If there's enough airflow from the cold end cooling fan and you can redirect it well enough towards the print it may just be enough.