Mastering Diablo 4's Endgame: Tips and Strategies.

To survive and thrive in World Tier 4 in Diablo 4, players should finish their altar and renown grind, stockpile key aspects, upgrade their gear and potions, upgrade their glyphs, focus on damage reduction, get key defensive aspects, and socket gems for health and armor. Flat damage reduction is the best way to ensure survivability, and players should prioritize aspects like Might and Disobedience. Gems can also provide important boosts to health and armor.