Just going to throw this out there, damn Z-Secs are the worst at the beginning. Those Chaingunner guys will be one of the biggest pains because they drain your health even on Recruit.
RoE will be pretty easy on Nightmare because there are plenty of bodies to get a charge from with the Artifact.
And of course Lost Mission you get the cube...
I have moved to PC gaming, so I
won't be on Xbox LIVE anymore.