Diablo 4 legendary crafting can mean the difference from MeadeDorian's blog

Each Glyph has both a Radius and a Bonus or set of bonuses it applies based on its rarity. For example, my rare Necromancer "Mage" Glyph has a radius of three on either side, and for every +5 intelligence node I unlock in that area, my skeletal mages get a +3.7% damage bonus D2R ladder items. Since it's a rare Glyph, it also has an additional fixed bonus when I have 40 intelligence unlocked in the radius. 

As you play and level, you'll unlock more class-specialised Glyphs and more Glyph sockets through your added Paragon boards, but generally, the key is placing a Glyph where its bonus can stack the highest based on the nodes available in its radius. In my case, there were more intelligence nodes in the Glyph socket's radius than dexterity, strength, or willpower, so it made sense to use a Glyph there that stacked an intelligence-based bonus.

If you hope to survive in the world of Sanctuary, Diablo 4 legendary crafting can mean the difference between life and deathor maybe death and death if you've chosen to level as a necromancer. Either way, the Aspects that are associated with legendary gear pieces are invaluable and can make a good build great when it comes to speed and efficiency.

Legendary gear drops have an RNG element to them, meaning you can't count on getting the exact piece of gear you need, or with the right stats. Item enchantment can help a little with this buy d2r items, but if you want to take it one step further, you can craft your own legendary gear with any Aspect that you choose. With that in mind, here's how to get started with Diablo 4 legendary crafting, and how to figure out whether crafted gear is more powerful than an equivalent drop.