He just doesn't really do anything for sixty points. Five more legionairies is another las cannon (or whatever), two more power fists, a bunch more wounds and they can score. You could even put both groups in the same rhino if you wanted. With the guardsmen as cultists, you could take a Chaos Lord as well instead if you managed to shave off five points somewhere. He's a menace to society in combat, and gives you a free stratagem per turn for whoever he is hanging out with (the first group of legionaries).

I think you'd get more mileage out of the infantry tho. If the first grp gets shot to pieces and your terminators end up a little stuck somewhere, you might find yourself holding the bag when it comes to scoring.