First things first, Varus is gaining popularity as an OP champ that is easy to play. Keep in mind that your champ is only as good as your skill, anticipation, items, and raw talent. I want to emphasize again that experienced players know when something is coming there way, how to prepare, and counter it. This guide will not only help your experience with Varus, but hopefully increase your LOL awareness and skill as a summoner.

This being my first build, I welcome feedback on how to improve this guide.
I will continue to add to and improve this guide as I learn.

Pros
Incredible range
High early damage output
Both slows and stuns
Solo/mid/jungle

Cons
Very squishy
Kinda slow to start
No natural life steal
Not ideal for 1v1 battle

This spell is always a good choice to have. Use it to cripple a fleeing opponent, hinder an attacking enemy, or nearly disable that quick champ who would put a thorn into your team fight.


Flash can be your best friend if you use it properly. With experience you will learn how to use this to get you into a fight, away from a fight, of escape certain death. This is a saving grace to have, so keep in mind your squishy toon needs an escape route.

Alternative spells

Good for getting away. Not much else to be said. But there are faster champs than you, even with Ghost. I have found myself unable to escape too many times, thus choosing Flash instead.

Not a bad choice, but doesn't really follow with Varus' role here. Being a ranged champ, if you are close enough to use this, you are close enough to loose an arrow.

What Not to Get

Not being a jungler by nature this will be a useless spell for Varus.

I have seen this used with Varus, and I laugh at the sight. Sure, it has its uses, but with the proper build this spell will be a waste to have. You are here to law down the law, not for support.

Greater Mark of Desolation Greater Mark of Desolation With an Attack Based champ you want to have Armor penetration on your side.

SPACE

Greater Seal of Alacrity Attack speed is critical to your lane pushing/holding and survival. IMO this is truly a must.

SPACE

Greater Glyph of Celerity Having some cooldown reduction will greatly increase your survivability and team fight prowess.

SPACE

Greater Quintessence of Desolation Greater Quintessence of Desolation Again, having armor penetration can only help your cause especially when against those tanky champs

All the basic offense points you would expect plus some. I focus Varus primarily on his AD output because that's what he is meant for. I added Cooldown reduction for obvious reasons, and having the 10% magic penetration is a nice touch to your ability damage. Remember what we're going for here is maximum damage output.

This ability will be maxed out first in order to make the most of your laning potential.

If you can remember this abilities use, it can do you well to remember in order to make the most if it. Get in your 3 basic attacks then lay down your Piercing Arrow for additional magic damage to be dealt.

I focus on this ability 2nd. Having some AOE with slow will help you chase those champs down and get the kill. Or just to make for a nice harrass maneuver.

Using this move wisely will help you in many situations. Trap 1 or multiple enemies with this to get the kill. Or escape someone who's hot on your tail for a clean getaway. Don't forget, saving your own life is a good a time as any to use your ult.

These are the most ideal items to have with Varus. Attack damage, attack speed, and a little life steal to help are critical to staying alive and ruling the lane.

Start with Boots of Speed to give you the movement you need to safely drift about your lane. I choose this first over Dagger or Doran's Blade because my main concern is staying alive, racking up gold, and effectively holding back the enemy.
Your next item will be the Berserker's Greaves to give you increased movement and 25 attack speed.

Now, regardless of what your situation is, you want to get this next, starting with Zeal. Grab Zeal as soon as possible, thus increasing your farming speed, and ability to hold off the opposing champs. After all, gold is what you need, why not get it a little faster? Stay resolute early game, I do not recommend trying to chase the kill until at least lvl 6. Play smart, they will come to you.

Lifesteal, damage. The exception to first completing Phantom Dancer is to grab Vampiric Scepter. With your now increased attack speed, this will allow you to stay in your lane longer, and even do some jungle action, however I don't recommend jungling till mid-late game. The fight for lanes is still hot, jungling now could cause your lane to crumble.

By now you are thirsting for even more damage output to put you a step ahead of your enemies. Grab your trusty B.F. Sword next to put you a step ahead of the other champs. Finish off by completing The Black Cleaver to gain some additional damage, attack speed, and a nice passive that reduces your targets armor by 15 for 5 seconds and stacks up to 3 times giving you 45 armor reduction. With your attack speed, this will be an easy accomplishment.

Ok, at this point you may not think it can get better than this. Your arrows are flying out at an astonishing rate, but we won't stop there. Purchase next the Recurve Bow to add another 40 attack speed under your belt. I would purchase this first rather than Madred's Razors because these benefits outway the other looking at the big picture here. Now sum it all up with the Madred's Bloodrazor and you get all of the above with a nice passive of additional magic damage equal to 4% of your targets maximum (not current) health. This will put the icing on the cake as your match will likely not have lasted this long or go much further than this.

Staying true to the build, your final item will be additional crit and damage. None better to go with than toping this off with an Infinity Edge. Your basic attacks will be draining the enemies health in split seconds. If you feel you must obtain this item sooner, it may be substituted in place of Madred's Bloodrazor.

This is where experience and match awareness come into place. Look to see what you are up against.
If you find yourself up against multiple armored enemies, consider this an option to add to your build. 40% armor penetration and some extra damage and those tanky champs will be feeling the pain. Consider this item because it is a percentage, not flat amount of armor pen. That means it will always shave off 40% of the enemies armor, no matter how much they have.

A nice increase in health, mana, and magic resist should you choose to take it. Oh, not to mention the passive spell block you gain from it respawning every 45 seconds.

If you find yourself too often confronted with AP champs, grab yourself Force of Nature to help protect you from their willy ways. As well as adding some nice health regeneration and movement speed to boot. With your lifesteal from your blazing fast arrows, your health regen will be insane.