Lost Sword Pet Gem Stat Priority and Upgrade Guide

To maximize your team's combat power in Lost Sword, prioritize offensive pet gem stats—specifically Critical Damage, Attack percentage, and flat Attack—over defensive attributes. Pet gems provide passive squad-wide bonuses, and because end-game PvE encounters feature enrage timers and lethal boss attacks, stacking damage multipliers yields far higher returns than survivability stats.

Pet Gem Stat Priority

Pet gems should be selected based on their contribution to your main carry's total damage output. Critical Damage and percentage-based Attack scale best into late-game content, while survivability rolls offer minimal practical protection against lethal boss burst damage.

Priority Tier	Target Stats	Strategic Function
Top Priority	Critical Damage, Attack %, Flat Attack	Universal offensive multipliers that accelerate kill times and prevent boss enrage timers.
High Value	Critical Rate, Penetration / Defense Ignore, Boss Damage	Stabilizes critical hit frequency and bypasses heavy enemy armor in high-tier content.
Situational	Elemental Damage, Skill Damage Amp	Effective when matched to a dedicated elemental carry, but inflexible across mixed teams.
Filler Only	HP %, Flat HP, Defense %, Damage Reduction	Low-impact survival stats to keep temporarily until offensive replacements drop.

Keep Critical Rate on your gems only until your main carry hits reliable critical caps through native skills and hero gear. Once your primary damage dealer consistently lands critical hits, replace surplus Critical Rate with pure Critical Damage or Defense Penetration.

Progression and Resource Management

Perfecting pet gem sub-stats is an intensive resource sink geared toward high spenders and endgame min-maxers. Chasing triple-offensive optimal rolls on every pet early in progression will quickly drain your currencies.

Free-to-Play and Early Progression: Unlock all available sockets across your active pets, equip whichever offensive or mixed gems you acquire naturally, and stop there. Settle for functional B-tier or mixed stat lines so you can reserve upgrade currencies for hero summons, weapons, and core gear.
Whales and Endgame Min-Maxers: Once your hero rosters and primary artifacts are stabilized, invest reroll currencies into top-tier stones. At this stage, squeezing marginal gains out of Defense Ignore, Boss Damage, and Critical Damage helps clear tight progression checkpoints and optimize leaderboard times.

Recommended Socketing and Upgrading Order

Follow this sequence to build your pet gems without wasting materials:

Unlock Sockets on Fielded Pets: Ensure all currently active pets have their baseline sockets open so no passive stat capacity is left empty.
Equip Prime Rolls to Your Primary Carry: Assign your highest-rarity Attack and Critical gems to the pet assigned to your primary damage dealer.
Merge Low-Tier Stones Sparingly: Combine duplicate lower-grade gems to reach higher tiers, but avoid spending locking or rerolling reagents on transitional stones.
Refine Sub-Stats on Endgame Gems Only: Reserve reroll and stat-locking currencies exclusively for highest-tier gems that will permanently remain equipped on your roster.

Common Pet Gem Pitfalls

Investing in Flat Defense and HP: Building defensive pet gems will rarely save a squad from wipe mechanics. Encounter failure is almost always resolved by increasing damage to break enemy shields or eliminate threats before enrage phases.
Rerolling Transitional Gems: Spending valuable reroll materials on low- or mid-tier stones wastes currencies that cannot be recouped. Settle for whatever baseline stats roll naturally until top-rarity gems are unlocked.
Overcapping Critical Rate: Failing to account for character-sheet passives and gear buffs leads to wasted stats. If your carry already hits the crit cap, excess Critical Rate on pet gems provides zero added damage.