I've beaten the first three levels on legendary co-op, but I can't seem to find anyone who can help me get past 4 and beyond. And admittedly, I'm not that great - not bad, but not great, and I don't see myself getting any better. I figure the only way I'm going to get this campaign done on legendary is to have an expert co-op partner who knows what they're doing and can really just, you know, let me tag along and direct how I can help.