How to upgrade weapons in NTE?

This weapon-upgrade page is more useful when it explains **whether resources should go first to a core weapon, a transitional weapon, or to keeping the whole team above a minimum line** instead of preserving one rigid rule set like 'farm this dungeon and max S-rank first' as a timeless standard. For current players, the more practical questions are whether the weapon will stay on an active core, whether its level is already a real damage or utility bottleneck, and whether further investment crowds out more urgent character growth.

A safer way to judge weapon upgrades is:

1. First make sure the current core weapon is not clearly holding back damage or rotation before filling in lower-priority pieces

2. Rarity matters for long-term value, but real investment priority still depends on how tightly the weapon is bound to an active character or team

3. For transitional weapons, bringing them to a 'good enough' level is often more efficient than forcing a full max too early while roster and resources are still unstable

So this page now focuses on material sources and investment judgment for weapon upgrades instead of preserving one fixed enhancement rule as the only answer.