Modding is becoming a pain in the ass. Third time today I've broken the universe. Now the Legacy Ash mod is getting stuck halfway through the install.
... and I haven't played the game at all in two days. *sigh* I wanna play the game, not fight with it.
When I hit that point, I say screw it and just copy over my backups. If it's causing that much trouble, I really find it's not worth it the stress. I went through that with DA:O at one point, and it turned me off the game for a little over 6 months. It killed my momentum, and just made me irritated. It might be a good idea to just take a breather for a bit.
As far as what I did today in the ME series, I rediscovered my hatred for Banshees. In my opinion, they are the hardest non-boss enemy in the series. Atlas mechs? A little tricky. Saren? Wasn't too bad. The Baby Reaper? Nuke it as much as you can, then chew it up with tech and biotics. Harvesters? Cake walk. Thresher Maws? Again, a little tricky but nothing a good nuke or two couldn't fix.
However, Banshees, between their movements, their instant kill melee hit, and their biotics, it just makes them the most painful of the regular fights imho. I also think it puts several of the boss fights to utter shame. Their shrieks don't help. 
I'd learned some tricks of the trade and I'd know how to slow them down once I can get a hit or two off on them. Still, they can kiss my pucker.