Hey there fellow Nephalem! When it comes to defeating bosses in Diablo III, it’s all about knowing their mechanics. Study their attack patterns and vulnerabilities to exploit them effectively. Always make sure your gear is up to date and synergizes well with your build.

For optimizing gear, focus on critical stats like Critical Hit Chance, Critical Hit Damage, and Cooldown Reduction. Don’t forget about elemental damage bonuses that complement your skills. Use Kanai’s Cube to extract legendary powers for extra bonuses.

When it comes to leveling efficiently, prioritize completing Bounties and Rifts for experience points and loot. Join public games for the added experience bonus. Consider crafting a Hellfire Amulet for an extra passive skill. And always be on the lookout for gear upgrades to keep your power level high! Good luck out there in Sanctuary!