Well hey, this is my first build/guide, and it's worked pretty well. Crits of around 900 or so late game, so it's pretty good. One important aspect to this build though, but hey we'll get into that later.

Unsure how to put the images here, so i'll just cover it with words (sorry for all those who dislike reading). I go with standard AD runes for seals, glyphs and marks. Quintessences are increased crit damage, because that's what will really save you later on.

I go with a standard 24/3/3 with this. This is because it ensures you get maximum damage, a little bit of armor penetration, small amount of armor and on the off-chance you die (which, lets face it, most do) the time to ressurrect and achieve vengeance is reduced.

Right, first thing's first. The items i've specified will give you enough attack speed to keep yourself alive against about three people so long as little CC is used. Since your level 3 ult gives 100% lifesteal, your huge amounts of damage is more than enough to take anyone 1 on 1, including Baron.

You want to start with q, just in case you get ganked early on or decide to facecheck the brush. Max e as soon as you can, get the ult levels as soon as you can, and leave your w until last. Best defence is a good offence in my opinion.

Surge works wonders with this build, but you're not too limited to what spells you use. Personally i usually go with surge and teleport. Surge will help quite a bit early to late game, and teleport allows you to warp around the field of justice, picking up minion kills and increasing your health. However, be warned, if the enemy has exhaust and ignite, you want to avoid fighting them too much. IF they use both on you, your chance of leaving that encounter alive dwindle.

Possibly the most important part of this AD Sion build. You don't need hp items, just make sure to farm as much as you possibly can. Once you have Atmas' impaler, farming will be your best tool. Try to aim for the 2.5k hp mark, but feel free to go higher if you want. The more hp, the higher your AD and survivability. Last hit, steal buffs if you must, but remember to get farming early and constantly.

Overall, this build should help you out with any opponenets, no matter who they are. If there's a teemo in the fight, ALWAYS take out him first. His blind will counter you so very well it'll put you to tears.