4th function: Something we're obviously crappy at. We tend to just simply overlook things related to this aspect of reality. If for whatever reason we find ourselves focusing on it, it feels confusing and frustrating, and it seems like there's no satisfactory solution to be had. We feel helpless, like no matter what we do we're still going to have problems in this area. There's just no way to win. Might make us wonder what's wrong with us.
8th function: Something we're proficient at and actually find sort of fun. It's not a big deal though in that we don't expect others to be good at it (and don't mind simply taking care of it for them). We've got more than enough to go around. We actually find our dual's blindness to this area endearing. It's amusing or cute. We recognize issues related to their weakness in this area as something that needs to be addressed, but at the same time we see that when they focus on it they don't get anywhere. It just stresses them out and detracts from the things we appreciate about them, their strengths. When they're simply overlooking it, it's easy enough to deal with through demonstration of our 1st and 2nd functions, and they respond well. We're basically doing it for them without making them feel bad about it or somehow flawed or lacking. When they are focusing on it, the best thing to do is generally to just encourage them not to focus on it and try to draw their attention back to their 1st and 2nd functions (or to our 1st and 2nd functions). Once they stop worrying about it, they're once again in a position to be receptive to our aid.