10-11 is probably sufficient for Div V. I think my best players were defending at level 11 or so when I promoted to Div IV and then by the end of my first stint in Div IV they were up to 15.
I wish there were pigmen. You get a few of these pigmen walking around I'm looking a whole lot better. Then if somebody wants to fix me up at least they could say, Hey he's no pig-man!