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Io (February 2014) Synergies / Counters

This feature is experimental. The synergies are calculated against the baseline rate at which heroes are picked at, but the counters are still skewed by the overall frequency that a hero is chosen. Use these as guidelines and compare with the overall tier list, rather than as strict fact.
Heroes Io Synergizes With
HeroChange
Tiny+%33.3
Sven+%5.4
Riki+%4.1
Centaur Warrunner+%3.6
Spectre+%2.6
Chaos Knight+%2.3
Undying+%1.3
Ursa+%0.5
Heroes Io Counters
HeroTimes Picked After
Natures Prophet6
Nyx Assassin6
Chen5
Doom5
Invoker5
Visage5
Rubick4
Slark3
Dazzle3
Crystal Maiden3