In Diablo Immortal, the Crusader is one of the best classes known for their AoE skills.
The Dark Silver Ingot is an endgame material you use to craft endgame items. It’s a bit complicated to craft though if you’re not well-prepared.
Merciless Copper Weapons are the next weapon tier right after Copper. However, getting them isn’t as straightforward as you would expect.
Cotton is a really important resource for crafting mid-game armors. However, you have to venture a bit further into the open to obtain it.