This guide will show you my way of playing AP Sion. While this is not extremely tanky, you will dominate your lane early, and as long as you play smart mid-late game, you will end up being awsome. Every time i play this build, i end up carrying my team all the way to the nexus with a positive ratio. I HAVE NEVER LOST A GAME AS AP SION.

Basics, More Mana = More castage, although you want mana per level because the crystal will allow you to do some spammage early on, ap is self explanatory, so is spell pen.

I go offense because you want as much damage early on, because if your opponent is slightly dumb then you can hit em with your shields early on, and either get the kill or force them out. Mana regen to help early on.

Start with a crystal to help with mana early on. Stay as long as you can, and as long as your playing correctly you should be able to get all the way up to sheen and boots your first time back. (I usually get mine around ten minutes, with no kills.) Sorc Boots for pen, lich bane to help out your melee attacks while still getting AP. Trust me, with this item Sion redefines burst. Deathcap for more ap, Scepter to help catch up to enemys after you stun, or popping your bubble will allow you to beat on them or allow your team to catch up, and also for some health. Banshees for survival, get this before deathcap if your getting beat on. If your still getting beat on, get rylais next, prioritizing giants belt. I usually win by this point, but if the game continues feel free to build up anything you like.

Flash for escape or so you can flash-stun-kill. Ignite helps you finish off an opponent that just barely survives. I've seen AP Sions with exhaust, but that makes no sense to me. Your AP not AD. Your stun allows you to catch up, and one you get Rylais running wont be a problem.

BUBBLE. Prioritize. This your damage, your farming, your protection. Bubble>Scary Look>RAGE>Cannable Use your bubble to hit both creeps and your enemy whenever possible. Dont just hit the enemy unless your sure you can kill them. Waste of mana. Hitting both creeps and the enemy allows you to farm, get gold, build up enrage, and zone your enemy. Gaze->Bubble only when they are pushed up to your tower, scares the **** out of most people, causing them to run, and you to chase. Just dont go too far. Enrage should be permantly on, just for the health. Get cannable whenever just to hit on towers. Some people grab one point, but i like to grab it whenever because its saved my life a few times, and we have a special bond.

BUBBLE. Hit creeps and enemy. Gaze bubble whenever they're pushed. Dont waste mana, be smart about items. YOU ARE NOT A TANK, YOU ARE NOT VERY TANKY. GO IN AFTER YOUR TANK, NOT BEFORE. Otherwise you run the risk of losing your bubble. Go for the ad melee carry if you can, if not the support. Hit bubble, gaze, hit, bubble, back up a lil bit, find your next victim. Pop ult whenever by a tower. Get gold. Blue buff if your ranged ap, support or jungler doesnt need it, or just steal the other teams. hope you enjoy the annihilation. Have fun!