I would be more suspect of your turbo oil return lines. Mine were completely clogged from coked up oil. My intercoolers were soaked in oil and it smoked like a James bond smoke screen. Replaced with new lines and it solved the issue.

Also to make sure you don't also have some issues with CCV, the only way to be sure is to add a boost/vacuum gauge to the crankcase. Just tap the oil cap and put the sender right in it. That's what I did for mine when I was designing my own catchcan and adjustable vacuum setup. Was on quite a different engine (N63) but same concept applies.