Just a thought I had the other day after reading about guys mounting their oil coolers horizontally. What if you moved the oil cooler down and angled it so the radiator and the oil cooler both get their own air supply.
Obviously shrouding or a splitter would help a lot.
I also have my mad dodgy paintbrush picture to illustrate what I'm talking about.

The blue lines are shrouding or splitter and the red lines are airflow.
What do you guys think?

 

looks good except that you've got a shroud COVERING the oil cooler.... unless thats a section of a shroud? wait.... no stillcovering it...lol

 

LOL oh yeah I guess it looks like that now that you mention it.
But no there won't be anything covering the front of the oil cooler.
The line was just meant to represent the side...

 

lol, just from looking at the diagram it looks like it would work just fine