
Lost Sword gear system is like any other RPG; from white for trash gear all the way to yellow for legendary.
We don’t recommend upgrading every single piece of gear unless you’re a new player and have nothing else to equip.
If you get at least 2 good lines, you can upgrade that piece to use until something better drops. Min maxing gear in this game takes ages so be patient.
They recently introduced a new item in the exchange shop that allows you to reroll stats in your gear,
Stat Reroll Ticket
Stat Reroll Ticket Description A ticket used for modifying the special stats of equipment. Using it will give you the option to change all the special stats of the selected equipment. .
It’s completely random and you can go from 2 lines to 4 or the opposite, bricking pieces of gear easily.
I would just save them for now until you have enough to reroll a good piece.
These are your usual flat stats that most games have. Item level, HP, attack, etc can be found here.
Unique stats can include not only flat but also % stats and more importantly, skills.
Anytime you see skills on an item, please check them since some can be really good even if the other stats are not desirable.
Random stats that are different depending on the piece of gear and rarity. You can rerroll these stats.
If two units are using their Ultimates at the same time, the one with higher priority will use it first.
Purely a PvP stat, so you can just ignore it.
You can completely ignore flat stats. They don’t scale well considering the numbers you can see in this game so % will always be better.
Also please remember this is only a reference. Each character is different and will require stats based on their skills.

ATK% = Crit Damage% > Ignore Damage Reduction%
Developers keep adding more and more gear that gives crit chance, so Crit Damage% is becoming more and more important over time.

Early/mid-game: Critical Resistance Increase% > Defense% = Block Chance Increase%
Endgame: Defense% > Critical Resistance Increase% = Block Chance Increase%

For trinkets main stats are more important than special stats.
When it comes to special stats, anything with % (pretty sure you can only get HP in the case of trinkets).
The important part is the special stats depending on the item. As a general reference:
Crown of the Dead
Crown of the Dead Main Stats Item Level: 180HP: 6019Attack: 728 Unique Stats Critical Hit Chance: 10%Status Effect Resistance: 10%Damage Reduction: 5%
Healing Goddess Statue
Healing Goddess Statue Main Stats Item Level: 160HP: 5347Attack: 647 Unique Stats Healing: 10%Status Effect Resistance: 10%Damage Reduction: 5%
Aegis
Aegis Main Stats Item Level: 137HP: 4574Attack: 553 Unique Stats Damage Reflect: Reflect 15% of your ATKStatus Effect Resistance: 10%Damage Reduction: 5%
Runes can only get 4 stats; Priority, HP, HP% and Critical Damage Increase%.