Depends on your prestige on how high up you can go, but dropdowns and pulldowns as Zhawks said are key. Lots of threads on that around, wish I had read them before my 4th season at D-II.
For Triangle, got to have a good Ath/LP/RB big man.
M2M defense rating is a little more important than the others, but at D-II it is still less important than Ath/Spd in my opinon.
As usual with recruiting, focus on guys close to you, but legitimately, you can get a drop down from anywhere, pulldowns, probably stick to within 1,000 miles and in, depending on budget.