Hey there fellow Nephalem! When facing Diablo III bosses, it’s crucial to study their mechanics and have the right build. For optimizing gear, focus on critical hit chance, critical hit damage, and elemental damage bonuses. Farming legendary items through Rifts and Greater Rifts is key. Efficient leveling can be achieved by running Bounties for experience and gear rewards, as well as doing Rifts for fast-paced leveling. Remember, teamwork and communication are essential for higher Greater Rift pushes. Good luck on your demon slaying journey!