to be honest i check adsense only once a day, but i check analytics 4 - 6 times a day an there i can see the adsense performance, and YES i know that reporting reporting there it's a few hours back from adsense
i've best experience with google analytics, i just started using it a few days ago, and much much satisfied.
YES definitely. Link your AdSense and Analytics accounts and you can track individual post performance and individual post CTR and eCPM witch could help you understand what did you done good and what you need to improve.
It's risky. Because if Google warns you about any violation they will give 3 days to fix it. There is a chance You will miss the message if you don't login once in 3 days.
When I first setup adsense I checked it several times a day but now I only check it several times in a month
At least 3 times a day althou that is getting closer to 2 times per day with more and more coming on my plate.