I found the base defense mission pretty easy on Classic, but then, I knew it was coming eventually so I made sure to keep my squad equipped. I've actually found most of the missions that are supposed to be hard pretty easy. Newfoundland is one that gets a lot of attention. I'm not playing on Ironman but I might as well have been, I didn't need to reload even once on that mission. I really am not seeing why it's such a big deal. Maybe it's because I had 2 MECs? They pretty much wreck house against chrysalids even real early in the game. Portent part 1 was challenging, I admit, but it WAS my first time doing it after all and now that I know where the enemies spawn subsequent attempts should be much easier. Portent part 2 was a bad joke, it was easier than most of the random UFO missions. Honestly starting to get a little bored with my current playthrough, it's become really easy. The only hard thing at this point is getting to Meld canisters before they expire.