Hello my name is Shadow, IGN: OpticShadow5, and this is my first guide on my main champion Gren Arrow. Now my ability order may seem weird but that is how i run him and it does quite well. I max W first for the attack penetration it does without any items. At level 3, you should get your Q for an escape and slow. Get your Ult at any chance you can get it. Second, max your passive after you max your W for that extra attack speed. it is extremlly helpful for taking out turrets, slowed champions, and clearing camps for extra xp. Your Q should be maxed next for the extra slow it provides. Lastly, max your E. I feel it is not really helpful and does not provide much besides a sticky bomb.

The mods i run are Enhanced Zeiss Goggles, Enhanced Deathstroke's Claymore, and finally Accelerated Soultaker Katana. The goggles are used for Crit chance which this build is built around. The claymore, of course, if for the extra damage, and the katana is tog et the attack boost faster. Three out of four Augments are silver critical chance. 

The stolen powers are your basic ones to run on all champions, Doomsday Invulnerability and Camera's, preferably Green Arrow's.The Green Arrow camera's of course help find the enemies ones and destroy them. 

To start the match, go three health vials, Zeiss Goggles lvl one, and one Will Vial. From there get the Goggles to level three then start on the Cheetah's Claw to sustain in lane. Get the Katana to level three for the attack speed and lifesteal. Although the life steal is a small amount, it will help. Start building the Promethium Mace fully then refund for the Claymore. Build the Mace once again and buy the last level for the Claymore. From there, it is up to you if you want more damage with the Revolver or attack speed with the Velocity Implants. If behind, it is best to build the Revolver by building the Mace to get a little extra damage while you wait for the 1500 coins. If ahead, go the Implants route to get the extra arrows into the enemy. Build both items fully. After building both items, start working on getting the Katana to level 3 and working the stacks up. Once built, you can then sell Cheetah's claw for more credits. Now usually this is my full build that i rely on, with the final item being defensive depending on the emeny team of course. If attack damage based team, I go Spear of Destiny or Suit of Sorrows. If power damage based, I build theMaster;s Prism. Both defensive items do have reflect on them which does help with sustaining in lane and teamfights. In late game, build the final level of the Katana for the extra damage. Also you can sell the Goggles for another damage item such as Lobo's Chain or Atomic Axe.

Now this build is built around critical chance. At full build, you should have around 60 percent. This means every 6 out of 10 AAs is a critical shot. That is over 200 percent extra damage! At full build, your AD should also peak around 300! With all that damage and crit chance, it is real easy to 1 or 2 shot a foe!