Btw, any ideas on the best way to counter a 1-3-1 defence? My interior players are not very good scorers, their inside shot isn't great, so I'm reluctant to try "look inside" or "low post" that would rely too much on them scoring near the basket
The obvious offense would be Look inside, or low post. If your team is mostly dependent on outside scoring, i would suggest Princeton offense. It is a mix of both outside and inside scoring, with very little mid range shots. Because, you cannot score too well inside, i would imagine players would drive in and kick out, well at least in real life, allowing for easier outside shots. Not sure if it works the same in the GE though.