I was just wondering how you guys treated the normal missions. Do you replay the same map over and over again until you complete it, or do you just clear the missions and go back to non-completed maps at a later date?

I've currently completed the first 10 missions as well as the maps 11-2, 11-3, 11-5 and 12-2. The other maps in missions 11 & 12 I have only cleared, not completed. Now the problem is, I've cleared 11-1 approximately 60 times over the last couple of days, but I still fail every single time. After doing the math, it seems that the map has a 0,78% chance of being completed. This basically means that I can keep trying another thousand times and still fail a thousand times.

What do you guys do in situations like this? Do you just continue to attempt the same mission over and over again or do you just ignore it? And if you ignore it, why? You'll have to come back to it at some point, might as well do it now, right? The issue after all is not that our units are too weak, it's the fact that there's a 0,78% chance of hitting the correct RNGs, i.e. coming back "later" doesn't help. So how exactly should I proceed?