Hi guys, sorry if this is a very newbie question but I honestly couldn’t figure it out. I don’t really know how to ask my question so I attached an image to aid. I refer to , ,…,  in my questions below:
- What does  mean exactly during normal (map) gameplay? How does it relate to ? Can someone give an example in numbers (e.g. if Kelile attacks X whose power is as such, then X will lose Y power)?
- What is , I think it changes from time to time, how does it affect the game, and should I shuffle between heroes (or should I defer from using heroes whose XP is small)?
- How does the  “582” relates to  “440” and  600, which number matters to decide whether a hero can stand more hits than another?
THANKKSS in advance.