Hard to describe but I am wondering about a modification to the above idea.
Hose one from crankase to top of a "can"
Can houses a submergible oil screen
Hose one dumps into center of filter - filtered air is taken off near top and side of can and plumbed to engine air inlet with no significant oil content
Hose 3 is taken off center bottom of can and is plumbed to oil pan returning "bulk" oil
The downside is this can really mask lots of blow by that may indicate impending engine issues.