Best not to mix and match like that. The Wagner unit will do a great job at keeping vacuum in the engine at all but WOT. Since no one runs WOT all the time, you are really dealing with idle & mid throttle issues with the PCV.
I'm going to start with the ME Wagner since it is the easiest install, and see what the improvement is. My car runs 10s - so wot is only at 10s intervals!