Last Z: Survival Shooter: Season 2 Resource Guide

To maintain progression efficiency in Last Z: Survival Shooter Season 2, stop spending resources on expiring seasonal rewards and save a baseline of 300 to 350 Golden Wrenches for major event milestones. Avoid spreading upgrades across all unit types, and focus strictly on permanent hero buffs and single-troop stat specialization.

Managing Golden Wrenches and Event Milestones

Season 2 event rewards often suffer from diminishing returns after reaching mid-tier milestones. Spending resources to complete every minor event cycle depletes your stockpiles before major banners arrive.

Set a spending baseline: Maintain 300 to 350 Golden Wrenches in reserve so you can fully clear high-value events that offer guaranteed hero fragments or exclusive gear.
Skip filler events: If an event only yields temporary stat boosts or cosmetic items, stop participating once you claim the basic rewards.
Cap spending early: Stop pulling on event milestones if the cost increases significantly for marginal power gains.

Hero Upgrade Priorities

Upgrading every hero dilutes your faction badges and forces reliance on scarce seasonal items. Focus exclusively on characters that provide lasting value to your account.

Criteria	Recommended Target	Upgrade to Avoid
Buff Duration	Permanent passive base or resource production buffs	Temporary seasonal stat boosts that expire
Material Cost	Heroes upgraded via standard faction badges	Heroes requiring rare seasonal-exclusive materials
Team Synergy	Units that fit directly into existing active squads	Units requiring a full team rebuild

Inflated total combat power does not equal effective battle performance. Distributing upgrade materials evenly across all troop types leaves your formations vulnerable in server conflicts.

Refine 3-Star Equipment: Concentrate your forging materials on upgrading core 3-star gear pieces rather than spreading upgrades across lower-tier equipment.
Prioritize Percentage Multipliers: Invest research points into Attack and Defense percentage multipliers instead of flat Health stat increases.
Specialize in One Troop Composition: Align your research bonuses and equipment stats with your single strongest hero class to maximize formation synergies for capital sieges and raids.