A guy with 11/8 10 OD and 10/10 IS/ID is already a very good SF for Div 4 or maybe even Div 3, imho.
But all of this depends on your tactic.
That level of SF can compete well in D3. He should dominate in D4. Probably more of a back up in D2.
I am surprised to hear that...my current SF, like I stated previously, is pretty much exactly that with no skill lower than strong on everything else. He is by no means dominant in DIV and I suspected I would have to move him to back up in DIII or outright replace him.
Maybe my DIV is just extra tough and DIII won't be quite as bad depending. I know IV.32 was known to be one of the toughest the last few years.
I will back off my stance slightly from OD 12 on opponents, but would not assume lower than 11 OD. 12/9 JS/JR would be rather nice in a base offense for DIV USA. Of course a touch less JR for look inside and a touch more for run n gun, but the OP asked about a Base Offense SF.