Something i wish i had done with a trainee of mine in years gone by was train him up so that he could play in a trainable position during league games. It became difficult to manage his minutes, and i was relying on him to get 48 mins at one position in a scrimmage, which, if he fouled out, meant he missed out on his full training minutes for that week.
So may advice.
I would train OD for the first 5 weeks.
Once his OD becomes, say, level 4, then you will be able to play him in normal league games (albeit against moderate opposition) at SG/PG without taking such a massive defensive hit.
This will in turn make it easier to manage his minutes in the long term, and wont leave you fretting over getting him 48 mins at PG in a scrimmage every week.