All the content in the game where units matter is elemental, meaning tier lists are a little bit pointless for this game.
Trickcal is a game where people just build elemental teams regardless of how "meta" the units are, running either 6 characters of the same element or 4:2 to still get the buffs to HP and ATK.
With all that in mind, I've decided to separate units based on what characters are worth raising for all types of content, overall elemental content and niche / filler characters.
This tier list is based on KR server and not updated after Renewa came out. It's still a good reference for global. When global comes out, we will be updating this with our own tier list.
T0
T1
T2