Get Low is very popular. Pancake tends to be less popular but I am starting to buy AE with this ability for my younger O linemen. I think get low is the safest bet. Cut block is meh for me but some agents swear by it. Pancake is another love it or hate it SA.
Cut block sucks, because when you cutblock you in essence pancake yourself. And if you miss, which happens quite often I think because of high agility defenders, then you are out of the play and your guy is free.