Guardian Wisp (Lo)

(Io)
Strength 17 + 1.9      Agility 14 + 1.6      Intelligence23 + 1.7

Tether

Io tethers himself to an allied unit, granting both units bonus movement speed. Any enemy units that contact the tether will be stunned. The tether will break if it stretches beyond 900 units. Lasts 12 seconds.

Spirits

Io summons 5 ancient Spirits over the course of 4 seconds; the Spirits dance around Io in a circle to protect him. If an enemy hero moves close enough to touch a Spirit, the Spirit releases its life energy in a burst, damaging all enemies in a 300 area of effect. Non hero units only take minor damage upon touching a spirit and do not cause them to explode.

Overcharge

Io draws on more energy than he can safely handle, granting him bonus attack speed and damage reduction, but draining 2.5% of his current HP and MP per second. If Io is tethered to an ally the bonuses are also granted to that ally.

Relocate

Io temporarily relocates himself, along with any tethered hero, to the target location for 12 seconds.

• • Affiliation:Sentinel
  • Attack Animation:0.15 / 0.4
  • Damage:43 - 52
  • Casting Animation:0.001 / 0
  • Armor:0
  • Base Attack Time:1.7
  • Movespeed:295
  • Missile Speed:1600
  • Attack Range:575
  • Sight Range:1800 / 800
    
    

Supporter semi ganker	Pure supporter build (Classic)
1. Tether	1. Tether
2. Spirits	2. Spirits
3. Tether	3. Tether
4. Spirits	4. Overcharge
5. Tether	5. Tether
6. Relocate	6. Relocate
7. Tether	7. Tether
8. Spirits	8. Overcharge
9. Spirits	9. Overcharge
10. Overcharge	10. Overcharge
11. Relocate	11. Relocate
12. Overcharge	12. Spirits
13. Overcharge	13. Spirits
14. Overcharge	14. Spirits
15. Attribute Bonus	15. Attribute Bonus
16. Relocate	16. Relocate
17+ Attribute Bonus	17+ Attribute Bonus

Item Build

Core

Prioritize those items more than anything else

	Without this, a single Relocate to Fountain cannot restore 100% health.
	Every team needs ONE Mek, don't get this if someone else did.Smack the bastard who steal Mek from Io! Doesn't matter if your team had excellent coordination though.
	Cheap yet useful item. A life saver from time to time.
	Staple for all HEROES.
	Another great item for Strength supporters like Io.
	Dude, it's your job to buy the Chicken & Ward

Utility

These items won't affect your build in any ways, they do more good than harm.

	Bonus armor and damage. One of the best slot-fillers for Io.
	Relocate or not, TP is irreplaceable.
	Before you have Bottle or Urn this is your main supportive item.
	This is good stuff, don't ask why.

RequestedIt's your job to fulfill your team's reasonable needs

	Good replacement/addition to Mek. Don't get this if your team is turtling or your gankers are noobs.
	Overcharge's alternative for spellcasters.
	For a supporter, allies come first. Obviously Io gain nothing.
	Against invisible heroes of course.

Situational

Here goes the "that's depend"

Good for your survivability, the regen is good for Tethered ally too. Same as Vanguard. Btw, the resistance stacks with Overcharge. Good disable and MS. Again, lack team influence. Physical damage? Ghost Scepter to the rescue! Ninja Io

Luxury

Don't know what to do with money? Here some idea

Did someone order a WALKING FOUNTAIN? Disable is good for everyone, except your opponents. Stats and Slow, who wouldn't want that? The Halberd is just a blessing from Heaven~ Worth every penny, cost lots of pennies though. Provide bonus armor and auras. No regen whatsoever, what a pity.

Friends: Allies that treasure Io's strengths.
Since Io is a supporter and he got lots of stuff to offer, everybody loves him
EXCEPT
Already fast heroes:
MS boost and IAS are useless.
Summoners
Hmm...don't know which one to support?
Illusion heroes
"Hey, you gave them MY position" that's what they all say.
*Note: The "everybody loves him" part applies. There's actually no known de-synergy hero with Io. However, the aforementioned heroes "wasted" Io's supporting potential in some forms while they still, of course, greatly benefit from healing and other stuffs he offers.
For example: Lycan's Wolf Form may not want the increase MS but he still needs healing like everybody else.

Foes: Enemies that exploit Io's weaknesses.
Spellcaster
Both nuker and disabler can send you back to the Fountain faster than Relocate can.
Silence
A caster without his spells is a creep with items!

<~ The worst of the worsts, a single combo of him can grind Io to dust, not to mention any spellcasters' nightmare - DOOM
Long range killer/invisible assassin
Fear the unknown!

There are a couple of skills that would cause bugs if use in combination with Io's skills. They could be either deadly or lame, bug exploit is a no go and IceFrog usually fix them every patch. Thus, this section will disappear anytime if mods don't like it or the bug is eliminated.
Butcher - Meat Hook
Butcher's Meat hook has some seriously dangerous combo with Io's Relocate. Meat hook can prevent Io from returning, which is good if Butcher is your ally but very bad if he's your enemy.
There also one illogically bug that pull one enemy to his/her doom when Relocate and Meat hook are used together (which is bug exploit and I don't encourage that).
Barathrum

Provided that you can see what's coming, Tether can be used anytime to stop Bara's Charge of Darkness otherwise, Io's dead before he realised what had happened.

The buggy part is: Relocate can easily send Bara and his Nether Strike to...Fountain if timed right. Also, if you attached to allied Bara while he was using the Charge, you can hitch a ride and follow him to the end of the world.