Drafting from the 5th spot,need help.rb premium

My league offers 1.5 points for every 10 rushing yards.i seem to find myself in situations where the best value in each of the 4 rounds are rbs.am I increasing my volatility and probability of an injury crushing my team??should I pivot and grab a wr even when a rb is higher on the board??any help is appreciated. 12th team league