Eureka ARAM Mayhem Augment Guide

Eureka: Converts AP to ability haste, allowing frequent spell usage without ability haste items, a core Rune for mages.

Eureka: Core effect: Gain 10 ability haste per 100 AP. Base bonus: +20 base ability haste. Max bonus: Up to 80 ability haste. Real-time update: Recalculates ability haste immediately when AP changes. Converted ability haste can benefit from other bonuses.

Eureka: All equipment that increases ability power All runes that increase ability power Ability power bonuses from hero skills Ability power potions and elixirs

Eureka: Attack, health and other stats, Temporary AP, Skill haste from items, Skill haste from other Runes

Eureka: Highest Priority: Applies before all other skill CDR calculations Adds with other skill CDR effects Still calculates even beyond skill CDR cap, but doesn't display Applies to all abilities: ultimates and regular skills

Eureka: High AP mages (like Ziggs, Viktor, Ziggs) Mages with long cooldowns Skill-reliant mages Mages who need to cast frequently

Pure AD champions Pure auto-attack ADCs Pure tank champions Champions with already short ability cooldowns

Eureka: Prioritize AP: higher AP gives more ability haste. Don't build too much ability haste gear: save slots for AP and magic penetration. Use high ability haste to frequently poke enemies. Can cast unlimited spells in teamfights.

Eureka + Jeweled Gauntlet: Eureka converts AP into ability haste, enabling frequent spell casts. Jeweled Gauntlet allows abilities to critically strike and grants critical strike chance scaling with AP. Together, they create a powerful synergy where building AP simultaneously increases spell spam frequency and critical strike chance, allowing mages to deal massive burst damage through ability crits on very short cooldowns. Eureka + Magic Missile: Eureka provides substantial ability haste from AP, enabling rapid ability casts. Magic Missile triggers on every ability hit, firing true damage Firecrackers based on the target's maximum health. The combination allows AP champions to constantly proc Magic Missile's bonus damage through their shortened cooldowns, creating sustained true damage output that compounds with their base ability damage. Eureka + Infinite Recursion: Eureka grants ability haste equal to 30% of AP, while Infinite Recursion provides 60 base ability haste that increases with each takedown. This dual scaling creates overwhelming cooldown reduction that stacks multiplicatively. AP champions become spellcasting machines, with basic abilities available nearly every second during extended fights, dominating ARAM's constant teamfights. Eureka + Phenomenal Evil: Eureka converts AP into ability haste for frequent casting. Phenomenal Evil permanently stacks AP when damaging enemies with abilities. This self-reinforcing loop means each ability cast grows AP, which simultaneously increases both damage and ability haste from Eureka. The synergy creates exponential scaling throughout the match, turning any AP champion into a late-game powerhouse.

Avoid Eureka + EscAPADe: Avoid this pairing because EscAPADe converts all ability power into bonus attack damage, which completely removes the AP scaling that Eureka relies on. With zero AP remaining, Eureka provides zero ability haste, making this combination completely worthless and wasting a Prismatic augment slot. Avoid Eureka + Slow and Steady: Avoid this pairing because Slow and Steady sets your attack speed to a static value and converts all bonus attack speed into attack damage. This forces an AD build path that does not generate the AP needed for Eureka's ability haste scaling, resulting in extremely low value from both augments. Avoid Eureka + Draw Your Sword: Avoid this pairing because Draw Your Sword forces your champion to become melee and provides heavy AD-focused bonuses including 30% bonus attack damage, 25% bonus attack speed, and 20% life steal. This AD bruiser build path conflicts with Eureka's AP-based ability haste scaling. Avoid Eureka + Blunt Force: Avoid this pairing because Blunt Force increases attack damage by 20%, encouraging an AD build path that does not synergize with Eureka's AP-to-ability-haste conversion. The raw AD stat provides no benefit to Eureka's scaling, resulting in poor stat efficiency and wasted potential.

Eureka: Don't build too much ability haste: Causes stat overflow. Don't ignore base ability haste bonus: Provides 20 ability haste even without AP. Don't take on AD champions: Value is extremely low. Watch ability haste cap: Value drops significantly above 200 ability haste.