Buy Chests in the Market for Better Weapons and Gear
You can buy chests in the Shadow of War market. Some of them cost Mirian, and some can only be purchased with the premium Gold currency, but both types will drop gear that is roughly your level when you open them.
The downside to this, besides having to spend some of your currency to buy them, is that chests will only drop items that are around Talion’s current level. That means that if you’re buying them during the course of Shadow of War, then you’re throwing money away because when you level up, the gear you got from the chests will only be useful for destroying to get a little Mirian.
Get Conquest and Vendetta Chests for Better Weapons and Gear
In Shadow of War, you can attack other player’s fortresses in async multiplayer. If you take their stronghold, you can get a Conquest Chest which contains some rare and epic gear. If you take on an Online Vendetta Mission, you can get a Vendetta Chest for winning, which provides less equipment than Conquest Chests, but is usually at least rare quality or higher. These chests can be earned just by playing the game and don’t have the Mirian or Gold requirements the ones for sale in the market do.
That’s the basics of upgrading your character in Middle-earth: Shadow of War. Check out our wiki for more on the game.