They suffer from several things which prevent them from ascending higher but can be used until better units are obtained.

B Tier (max 35 units) is for filler units.They may suffer from a few drawbacks but are otherwise solid. Units in this rank are nice additions to their respective teams, and will generally assist in the building of a good team.

A Tier (max 20 units) is the tier right below.

(Super & Extreme Rainbow list max 15 units) This includes practically all of the leader units for that type and/or Category. They are excellent additions and in some cases, optimal.

S Tier (max 12 units) is for the units at the top of their class.

Mono teams such as AGL have fallen out of use in the meta. The teams currently with a tier list are Super/Extreme of 'Color' types, Super/Extreme in general, and Category teams. There are multiple team types in the game and therefore multiple tier lists. The Tier List is a list which ranks units on their importance, effect, and relevance in the current meta of the game.

Dokkan battle tank super