Diablo III- Skills Article CLXII: The Wizard, Theorycraft Four- Back I Say

Primary Skill: Spectral Blade (Impactful Blades)
Secondary Skill: Arcane Orb (Tap the Source)
Defensive Skill: Teleport (Wormhole)
Force Skill: Wave of Force (Impactful Wave)
Conjuration Skill: Storm Armor (Scramble)
Mastery Skill: Mirror Image (Mocking Demise)
Passive Skills: Glass Cannon, Illusionist, Critical Mass

This build, despite the number of short range skills, is intended to operate at long range whenever possible.  Arcane Orb is a strong offensive skill, and with Tap the Source, it can essentially be spammed heavily, dealing out plenty of damage.  It’s a bit restrictive to have only one mainline offense skill, but something as strong as Arcane Orb isn’t much of a loss.  If you feel you need something more along the lines of continual output, Disintegrate or Arcane Torrent can be used, but neither of those is as good in a damage-for-cost and time-efficiency sense as Tap the Source, and when you’re trying to stay at long range, channeling a spell really impairs your tactical movement.  Impactful Blades is selected as a tertiary way of keeping enemies off your back- if you find you don’t need it for that so much, then you can either swap it to Thrown Blade for range, or Magic Missile (Attunement) if you need the Arcane Power generation more.

Teleport and Wave of Force are selected for their ability to either keep you clear of enemies, or force the enemies clear of you, respectively.  Wormhole gets you the most range out of Teleport, always your prime consideration if you need to stay far from what you’re hitting.  Impactful Wave similarly increases the distance between you and your enemies.  Since you have such abilities on tap, Glass Cannon is much less of a risk- you’re generally not going to get hit except at range, and if you move regularly with Teleport, a lot of ranged attacks will miss you as well.

After those, you have Storm Armor- a retributive effect to weaken things that happen to get near you so that in the event you fail to evade or repulse them, you can kill them more quickly.  Scramble also boosts your movement rate, even if you’re getting hit by something out of range of the main Storm Armor effect, which lets you regularly reposition in small increments to avoid ranged attacks and enemy spells- another reason Arcane Orb was selected for the secondary skill, rather than a channeled spell.  Mocking Demise, meanwhile, turns Mirror Image from a pure defense into a punitive one- anything that sticks around next to you long enough to kill one of your dupes will not only take damage, but has a good chance of being Stunned and stuck in place while you either blast it into oblivion or move back from it.  Since you’re relying both on Mirror Image and Teleport and you haven’t got much in the way of defenses, Illusionist will get you both skills back in the event anything hits you notably hard.  Finally, Critical Mass, particularly with the number of hits (since each enemy counts separately) you can pump out from Arcane Orb, Storm Armor and, in emergencies, Spectral Blade and Mirror Image, goes a long way to easing up your cooldown woes from Teleport, Wave of Force, and Mirror Image.