This is my personal tier list based on using/going against these characters as well as their abilities from early to late game in PvE and PvB (Player versus bosses).
Guide to Tier Lists
By Winter
This is all based on my experience on using these characters from my hero and using other heroes in group trials as well my friends/guildmates suggestions!
All characters can be strong if you build them right and as well on luck!
Early to Midgame
Late Game
Bosses like World Boss and Barbarians
Important note: The last two pics can be switched up since they are both good for late game!
Even with characters on the S tierlist being strong, they can still be counter with a character equal power but in a different faction since it can counter based on luck and timing.
Even with a large gap of power, you can still win if you have luck by your side or you click the right timing.