generally speaking, the increase in WE is almost non-exsistant and even if you get it to 10, you'll not see any noticeable change in what he keeps in the offseason or IQ improvement to make the attempt to purposely increase WE worth your time.
so my .2 cents would be to never start this guy in hopes he'll sneak a WE point or two. just play him as his skills and IQ dictate in your rotation. if he's your best option, start him - if not, there's nothing wrong with him playing 20 MPG from the bench. if he's got some HIGH/HIGH cores you like, you can pump those up with the most practice time and they will end up increasing overall in the end (minus the off season losses). all things considered, i don't go below a 20 WE anymore. those starts you might give him will pay more dividends to the guy with a better WE and the minutes are often better served going to someone who will be much better than this guy in 1-2 seasons.