This is a class tier list guide for the game "My Party is Grinding," ranking the five available character classes by their strength and viability in battle. Such guides matter to players trying to build effective teams efficiently, as picking the right class early can significantly affect progression, particularly against tougher bosses.

The Assassin and Mage top the S-tier list, with the Assassin praised for its exceptional damage, area-of-effect skills and surprisingly strong health with the right gear, while the Mage offers versatile elemental attacks best used against specific boss weaknesses. A-tier includes the Warrior, a balanced tank-capable melee fighter, and the Archer, valued for range and elemental flexibility despite weaker health. The Knight sits alone in B-tier, criticised for poor tanking despite being the easiest class to build, with the guide suggesting it be replaced as soon as possible.