Diablo Immortal Auxiliary Gem Overhaul and PvP Matchmaking Guide

In Diablo Immortal, the auxiliary gem system allows you to replace the legendary proc of an equipped primary gem with the power of a secondary gem while retaining the primary gem's full resonance and Combat Rating. To optimize your character under this system and the revised Battleground matchmaking pool, slot high-utility auxiliary gems into your highest-ranked primary gems and shift your progression focus toward secondary attributes.

How the Auxiliary Gem Overhaul Works

The overhauled auxiliary gem system decouples an active legendary power from the underlying stat investment required to upgrade it. Previously, equipping a new or unranked Five-Star gem meant losing significant resonance and Combat Rating compared to a fully upgraded lower-tier gem.

Under the updated mechanics, your primary socketed gem continues to determine your gear slot's base stats, resonance boost, and Combat Rating. The auxiliary gem merely supplies its unique combat proc and skill interactions. This structure allows you to run situational utility gems—such as crowd control, shield procs, or burst-damage effects—in PvP and PvE without dismantling your primary gem ranks or spending crests to rank up test stones.

Rules and Limitations for Auxiliary Gems

Before attaching an auxiliary gem to a primary gear slot, account for several structural restrictions:

• Resonance Anchor: Only the primary gem contributes resonance and Combat Rating to your character sheet. The auxiliary gem contributes no numerical stats.
• Rank Parity Constraints: An auxiliary gem functions only at its own innate rank. Slotting a Rank 1 Five-Star gem into a Rank 10 Two-Star base grants the Rank 1 version of the Five-Star proc alongside the Rank 10 base resonance.
• Single Assignment: You can assign only one auxiliary gem to each primary gem socket. Multiple auxiliary powers cannot be stacked in a single equipment slot.
• No Duplicate Procs: Identical legendary gem effects do not stack across your build. If you equip the same gem as both a primary stone and an auxiliary stone in separate slots, the duplicate proc is disabled.

PvP Matchmaking Adjustments

Battleground matchmaking updates rebalance how team lobbies are formed, moving away from systems that relied almost entirely on total resonance.

Because secondary attributes now weigh heavily in lobby balance, prioritize upgrading Iben Fahd's Sanctum vessels and rolling complementary gear reforge attributes. Artificially inflating resonance with poorly synergized gems no longer provides an easy competitive edge in Battleground queues.

PvE Tournaments and Daily Codex Updates

The update also adds standardized PvE tournament modes and daily management refinements:

• Fixed-Scaling PvE Events: Tournament activities feature normalized damage multipliers and fixed difficulty brackets to reward mechanical execution rather than gear disparity. Focus on grouping elite packs and slotting auxiliary gems with movement speed or burst on-kill effects to improve completion times.
• Codex Visibility: The Codex now includes adjusted timers for regional schedule shifts and daily resets. Complete your four daily bounties, three Battlegrounds, and active dungeon objectives immediately after reset to maintain the flow of Hilts and scrap materials needed for gem upgrades.