If you're going to use him as PF he doesn't need to shoot 3s to take advantage of poor outside D on PFs he can step out to midrange and shoot or drive past poor D so strong to proficient is plenty for me. I'd sacrifice a little range and maybe an inside/outside D pop for some shot blocking; if he is to play Pf he'll need shot blocking to counter look inside offence. Other may disagree but also FT is a worry....
Really nice player though and will be your cornerstone player for years to come :)
JB