Tier lists

Six full rankings. Each category uses the S+/S/A/B/C/D/F rail.

5 entries
Bosses

Every boss ranked by difficulty, reward yield, and meta impact. The Lord of Lava sits at S+ because the Magma Staff is the single most important crowd-control weapon in the game.
7 entries
Weapons

Every weapon ranked by raw DPS, utility, and meta dominance. The Magma Staff is uncontested at S+ - the burn DoT is the cleanest answer to the Ghost Pirate swarm.
3 entries
Eras

The three progression eras ranked by survival pressure and progression yield. The Industrial Phase sits at S+ for the Bonfire Level 5 apex and Day 100 trigger.
14 entries
Materials

Every material ranked by tier-rarity and end-game value. Titanium and Advanced Fuel are uncontested at the apex.
15 entries
Badges

Every achievement ranked by rarity and meta prestige. The Magellan and Challenge 4 badges sit at S+ - both at 0.0% statistical completion.
7 entries
Crafting Stations

Every crafting station ranked by progression criticality and economic impact. The Bonfire sits at S+ - it gates the entire technological tree and the Day 100 extraction trigger.