I used to be same position as you too but this is why I strived to be the best, to explain things simpler and understand many things myself.
Btw did you get to try the game?
Quality of weapon - this determines item roll chance. Higher item quality means higher chances to get perfect affixes so if you wanted 50% Glasscannon but you didn’t get that affix initially at 50%, you can have a higher chance rerolling it with Diamond Crystal until it shows as a perfect 50% .
The same applies with a crystal affix such as crit DMG to 225% . It may be that the crystal won’t give you the exact maximum value and instead give you 180% crit DMG instead of 225% so rerolling it helps and higher item quality gives better chances for maxed out rerolls at level 100 or any level your gear is.
Another reason you’d want 25% item quality is so you also have higher chance on getting perfect affix rolls first time without having the headache of rerolling to perfection . You have a high chance to get perfect 225% crit on a 25% quality item as opposed to 0% quality or negative item quality. I know this from experience.
Maximum Item Quality is 25%.
Talents - you unlock these at early level 20 and they can be ok to understand but there are so many of them and it does take time to get used to them. At level 100, you can get maximum talent at 20 , but the extra 20 you can get from affixes on gear to 40.
Talents are great for any build to provide my additional buffs you can’t find elsewhere or to add to your build as if it’s an extra slot .
The maximum amount of talents you can put on gear usually is 4. One on chestplate , one on hat , one on amulet and one on the ring. The talents are based on those gears also.
Affixes- basically anything you add to a gear/legend or crafted gear. They are basically stats as other games call it but it’s a fancy way of saying stats . Also because there is a stats page so affixes is a clear distinction from stats to prevent confusion as I seem to find it.
They can usually be found naturally through items from normal rarity to legend rarity. Legend items are a good item to look out for in the beginning of the game to experiment with many affixes as you will start off with bare minimum and work your way up from no affixes to some affixes when levelling up.
There are Eternal legends but those items are basically green legends with doubled affixes - however they are too powerful so you cannot manually make changes to them unlike other rarity of gear , apart from changing the talent, the nature and importantly, the actual class. You can’t level them up either but a level 100 eternal can be powerful depending on what you think is good.
They have a same name as an actual legend though , but it says Eternal on the name.
There are also crystal legends which can naturally occur with a crystal affix . Basically legends with a chance of crystal affix but they have same name as normal legends.
Crystal Legends and Eternal Legends both are quite rare on their own to find so there are affixes in game to find them easier, and they have good value for converting into Ultra Rare Crystals or equipping. The rare chance to find them applies to the vendor shop as well as loot from monsters.
You can also find pets from any rarity. Legend pets are special because of set affixes and 5 epic affixes that you can use but they aren’t easy to come by without farming . Other pets do help in early game in rarity. Eternal pets do exist also but they cannot be edited by crystals , but they have double affixes.
By double affixes, I mean for eg , 75% crit DMG to 150% crit DMG aka 75%×2= 150%. This is thanks to the 50% item quality on the eternal items that naturally comes.
As well as different rarity of gear , there are also different rarity of affixes, higher is usually better.
Normal Affixes , Epic Affixes, Legend Affixes, Set affixes , Crystal Affixes and also Mythics.
Normal affixes are well, normal and found anywhere. Can also be added by Angelite crystal . Used at early level but not much use after playing more of the game.
Epic affixes - they can be found typically on legends as legends will not feature normal affixes , and other items of non legends and including pet. Not as easy to add but you can add Epic Affixes using Angelite crystal and by Topaz crystal. Topaz crystal is more expensive.
Legend affixes - These affixes are only found on legends but can be added on any item (except pets and eternal legends) . Can be added using the ultra rare tier crystal called Ruby. They have a lot of power behind end game builds than epic affixes but epic affixes are still used in end game to help.
Set affixes - arguably the most important for a build. They appear on legend items and legend pets but can be added using the ultra rare tier Amethyst crystal. They have a lot of power behind them and you can best utilize them when you have multiple of the same set. This can be done having 2 legends with the same set affix or more , or by using +2 all sets or more.
This affix appears Green.
Crystal Affixes - just as important and the most powerful affix after a set affix. It is usually ×3 the value of epic affixes or so. The catch is that you can only have 1 per gear and pets won’t have it. They can be found by natural legend drops or by adding using the Ultra Rare Obsidian crystal. Obsidian really is quite rare and expensive to find so it’s something to use wisely when found.
Why? Crystal affixes cannot be removed once added . I mean you can use the quartz crystal but that has a random chance to erase all affixes.
This affix appears Cyan, a mix of blue and green together.
Not all affixes can be added as some are only found on certain legends but most affixes are able to be added.
Mythic affixes - They are purple tier items but not found in floors. You have to manually make them yourself.
Mythics can be made using 4 empty sockets which you can add by a Zircon crystal which is considered ultra rare in game standards , but some legends or loot tend to already have an empty socket for you to save the crystals spent. There’s even a legend that has 4 empty sockets so it’s basically a free mythic.
You need to fill those empty sockets with specific named mythstones in a specific order to get a Mythic that you want. Be careful as one the mythic is added, you cannot remove them via Kyanite crystal like you can with other affixes so it’s like crystal affixes in that behaviour of not being removed, unless you want to kill your gear. Although if you didn’t fill all 4 slots and you thought you messed up, you can remove a mythstone from a socket.
Actually Mythics are extremely powerful affixes that many builds tend to revolve around and a useful buff to builds in general. You can have mythic skills from a weapon mythic that randomly happens (procs) , a buff to DMG or skills or affixes via chestplate/head/ring/amulet , and a resource mythic.
Resource mythics can be added on any gear unlike most mythics that are gear restricted and they change the resource system. That means it changes the typical HP/MP system to whatever it states. It also includes weapons when using the Discordance Mythic to swap values between primary and secondary skills.