I had played around with the NOD Redeemer a little bit and wow does it pack quite a punch. I think it's even tougher than the MARV, although it may not hit quite as hard as the MARV does. The Redeemer has only two infantry upgrade slots where the MARV has four, but the Rage Generator goes a long way towards getting the job done.
Got a little video below of a Redeemer rampage. Doesn't quite show everything that the Redeemer is capable of, but it's a nice test.