Io/Counters

Bad against...

 * prevents Io from healing the target.


 * allows Bloodseeker to see where Io relocated to, should either Io or the tethered hero have low health.
 * forces Io to stay in place, preventing it from using the Tether bonus movement speed to escape.


 * is very effective against Io, as it has very low armor and has to stay close to the fight to not break its Tether.


 * and allow Clinkz to quickly kill Io due to its low armor.


 * directly negates Relocate.


 * is very effective against Io due to its low health and armor.


 * will usually hit both Io and its tethered target since both will be close enough for the lightning to jump.
 * and hit all units near Leshrac, meaning he can do colossal damage to Io and its tethered target.


 * can cancel Tether and Relocate.
 * and make short work of Io and its tethered ally.


 * allows Phantom Assassin jump directly to Io.
 * makes short work of Io's low health and armor.


 * and allow Sniper to reach Io even if it stays in the backline.


 * can be used to escape or counter-initiate against a Relocate gank.
 * and is devastating due to Io's low armor, and can even knock it away from tethered target.


 * can be used to save a hero from a Relocate gank.


 * can render the extra attack speed from Overcharge meaningless.
 * and are very affective against Io, as it has to stay close to its tethered hero.

Others

 * Heroes that are hard to gank:, ,
 * Heroes that can easily bypass Io's allies to get to Io:, , ,

Items

 * greatly reduces the amount of healing Io can do.
 * takes out Io quickly in teamfights.
 * allows players to jump on Io for quick kill.
 * shuts down Io's mobility.

Good against...

 * Drow Ranger's lack of escape abilities makes her an easy target for Relocate ganks.


 * Tether helps Io escape from Earthbind even if Meepo has Blink Dagger.
 * Io's Spirits can pressure Meepo while laning and will usually hit at least one of his clones.


 * Nature's Prophet is extremely easy to gank with Relocate while he's split pushing.
 * Tether on a friendly unit can destroy Nature Prophet's trees should he surround himself with as a defense.


 * Phoenix's limit AoE, damage-over-time abilities give Io plenty of time to save allies with Relocate.


 * Tether and Overcharge makes it much harder for Pudge to kill a target with, and Relocate can save the Io's ally while is being channeled.


 * Io can escape from Pit of Malice with Tether or Relocate.
 * Relocate can counter Dark Rift's split pushing.

Works well with...

 * Chaos Knight's single target disables makes him a formidable ganker when Relocated.
 * can bring an enemy into the Spirits slow.


 * Tether's regeneration and movement speed buff fuel Gyrocopter's abilities and ganks in the early and mid game.
 * Spirits's movement speed slow keeps enemies in range of Gyrocopter's abilities and attacks.
 * Overcharge's attack speed buff complements Gyrocopter's attack damage items in the late game.


 * works with Tether, healing both heroes for an enourmous amount.
 * When Juggernaut uses, Io's Tether will persist, buffing Juggernaut's attack speed with Overcharge.


 * 's heal is very powerful when combined with Tether.
 * Relocate can be used to pick off lone enemies using.
 * Overcharge helps Legion Commander win s more easily.


 * With, Io can Relocate two heroes at the same time (three if Lifestealer has ) for a surprise gank.


 * 's movement speed slow helps Io land Spirits.
 * Overcharge makes Phantom Assassin more durable and allows her to get more hits in.


 * becomes more powerful with higher movement speed, and benefits from Overcharge's attack speed increase.
 * Tethering to Spirit Breaker while he is using can pull Io along for a considerable distance.


 * Sven's mobility is greatly improved by Tether.
 * and will take down an enemy in no time after a Relocate.
 * Mana regeneration from Io's items allows Sven to initiate much more often with.


 * Tiny's burst damage with and  is ideal for finishing off enemies quickly during a Relocate gank.
 * Tiny can also Io if the enemy gets away.
 * Relocate helps negate Tiny's mobility issues.
 * Overcharge greatly boosts Tiny's slow base attack speed.


 * Ursa's burst melee damage makes him an ideal ally to bring along on Relocate ganks.
 * Ursa's mobility is greatly improved by Tether.
 * Overcharge will allow Ursa to dish out heavy damage with as well as making him literally invincible while enraged.

Others

 * In general, heroes that can stun and beat down an opponent quickly will work well with Relocate.
 * Heroes with long disables make up for Io's lack of them and can buy time for Relocate's channel:, , , ,
 * Heroes who can provide vision help scout out Relocate's destination:, , ,
 * Heroes with area healing abilities, combined with Tether, provide large amount of regeneration to Io and tethered targets:, ,

Items

 * 's health drain is mitigated by Tether's healing.
 * and Relocate to bring in another hero make ganking easy.
 * can heal your teammates and tethered hero large amounts of hp.
 * grants you and your tethered teammate amazingly high survivability.

List of heroes that counter Io, and list of heroes that work well with Io.

Io/Противостоящие