Heimerdinger

Arena changes

• Q: Turret health changed to 70% value.
• Q: Turret base damage changed to 4 to 12.
• Q: Turret AP ratio changed to 25% AP.
• Q: Turret beam base damage changed to 40 to 120.
• Q: Turret beam AP ratio changed to 55% AP.
• W: Initial damage AP ratio changed to 65% AP.
• W: Cooldown changed to 10 to 6 seconds.
• R: H-28Q Apex Turret base damage changed to 50 to 80 3.
• R: H-28Q Apex Turret beam base damage changed to 90 to 160 3.²

• Zone enemies with turrets, use E, and keep moving while placing turrets and casting spells. Cooldown reduction can help; Skilled Sniper or effects that lower E's cooldown, such as Eureka or Infernal Conduit, are recommended.³
• Hold one or two turrets for a combo. High-AP builds such as Wooglet's or Witchful Thinking, followed by Void Staff, are recommended; burn and on-spell-hit effects can be middling for Heimerdinger. Early armor and magic resistance shards can help when he is focused.⁴

• Spread turrets out so they cover each other, similar to spreading out Zyra's plants to avoid area damage.⁵
• Turret basic attacks do not hit target dummies, but their laser attacks do. Turrets do not target the dummy, though their beam attack fires if Heimerdinger uses a skill on it.⁶⁷
• Skilled Sniper works with Heimerdinger's E.⁸

Earlier formats

• Since patch 14.12, Heimerdinger's turrets correctly gain Minionmancer's bonus health.¹¹¹² 8x2 duos
• Since patch 14.12, Fey Magic works with abilities tagged as ultimates, including Heimerdinger's.¹³ 8x2 duos
• Since patch 14.11, Heimerdinger's Q no longer gets locked out sometimes when he has charges.¹⁴ 8x2 duos
• A turret placed as E landed could immediately fire its laser; the same timing applied to W.¹⁵ 8x2 duos
• Rylai's was effective on Heimerdinger.¹⁶ 8x2 duos