Hey fellow Nephalem! When it comes to defeating bosses in Diablo III, it’s essential to understand their mechanics. Make sure to dodge their telegraphed attacks and utilize crowd control skills to gain the upper hand. For optimizing gear, focus on critical hit chance/damage, main stat bonuses, and elemental damage that complements your build. Don’t forget about legendary gems and set bonuses for that extra edge. When leveling, prioritize completing bounties and rifts for experience and loot. Also, consider power-leveling with a higher-level friend in adventure mode for faster progress. Good luck in your demon-slaying endeavors!