Your Sinners' levels directly impact their combat prowess in Limbus Company. This guide outlines efficient XP farming methods to bolster your team's strength. Even top-tier Sinners will struggle against underleveled foes.

Initially, XP is primarily earned through combat. All team Sinners gain XP upon clearing battles, regardless of participation, although active combatants receive a larger XP boost. However, this method proves slow, especially as challenges intensify.
Unlocking Luxcavation (mid-Canto 2) provides a more efficient approach. While Luxcavation battles offer decent XP, their primary benefit lies in the acquisition of consumable items crucial for accelerated leveling.

Level Boost Tickets and Identity Training Tickets offer alternatives to grinding. These consumables expedite the leveling process.
These tickets provide a fixed XP increase to a Sinner's Identity, functioning similarly to level-up materials in other RPGs. While effective, maximizing a single Sinner requires substantial quantities. Four tiers exist:
Acquisition methods include EXP Luxcavation stages, Limbus Passes (both free and paid), and periodic attendance events.
Level Boost Tickets instantly elevate a Sinner's Identity to a specific level, offering a significant time-saving advantage. However, they are rarer than Training Tickets and primarily obtained through the Limbus Pass and occasional attendance events; they cannot be farmed. Levels achieved are:
The maximum Identity level is 50. Strategically using both Level Boost and Identity Training Tickets optimizes multi-Sinner leveling.
To use consumables, navigate to the Sinners menu and long-press the desired Sinner's portrait.