Unless I am missing something (which is very possible) I can't find an easy way to see stats on the following:
1. Best-Performing Tags (both for open and click)
2. Best-Performing Days
3. Best-Performing Times
I realize you can download all the contacts and try to filter the results, but it is very time consuming. Also, the date/time that you have listed does not act as a correct date/time field. Having them separated would also be very helpful.
I'm very sorry that our product does not have the feature of showing the best performing tags, days, or times. I will get this feedback to the appropriate channels. This feedback helps us improve the product for our valued customers, and we really do take it seriously!
Until then, if you go to the Reporting tab up on the top of the screen, it will take you to a page that has a graphical representation of the Sends/Opens/Clicks data that may help you further. Here is an FAQ that shows you how that graph works! Let us know if you have any further questions or concerns about reporting data, we will be happy to answer them.