either run block or get low...depends on the build, strength, and how your running game is set up. get low is going to be worthless if you have crappy strength, agility, and blocking. run block is a modifier to blocking, so it's no good if your blocking sucks.
for rimington I'd consider getting rid of the pancake piece, and go for one pass protecting piece (foundation, pass block) and one run blocking or hold block % piece.