A few tips and tricks for the new Sion
I've been playing the new Sion for a while now and I just thought I would share some things that I've discovered while playing.
Your ult is a huge part of winning as Sion. Whether or not you hit it can mean the difference between killing someone in lane or getting utterly destroyed, or winning a teamfight or baiting your entire team to die a horrible quadra-death. It's a massively powerful skill, so make sure you make the most of it. If you don't land your ult in a teamfight, you have two possible situations, and you have to read into this fast. Situation A: your team has not engaged. V-ping as soon as you realize you're not about to hit anything and keep running until a safe distance away, then cancel ult by pressing R (don't keep running or else you might end up too far away!) Situation B: your team has engaged. As soon as you realize you're not going to hit anything, press R to cancel ult and walk back into the fight. From there you can try to help your team disengage or try to finish up the fight anyway. Keep in mind that by missing your ult you've lost out on a huge portion of your team's damage.
If you get Ravenous Hydra (which I highly suggest you do), don't charge your Q in teamfights unless you are going to hit more than two people with it. It's just not worth it unless you hit a majority of the team. Your basic attacks will do more damage if you use your Q as a basic attack reset instead (tap Q right after basic attack). The base damage for the Q is not bad, and by tapping Q you don't risk getting cc'ed while charging and spending all of that time doing nothing for nothing.
Sion top? Max E first. Yes. Do it. Q is a cooler skill? No it isn't. E is your friend. E is 25 mana at all skill ranks (insanely low) and can be used to zone your opponent in lane super hard. You can even zone ranged champions with your E (as a melee!) It's that good. Play it just like you would as Cho'gath top. Line yourself up for the E and fire away at minions to slowly shred HP off of your opponent.
DO NOT FLASH AWAY FOR "CLUTCH SURVIVES". If you are at low health and you feel like flashing away, don't do it. I know to some of you it's a habit, but all those times you do that and fail, you waste not only a flash, but also your passive as well. Save flashes for readjusting yourself in teamfights (e.g. when you fail your ult) and other stuff like that. Oh yeah and don't take teleport. Your ult gets you places well enough. The other summoner spell, you say? Exhaust. It can really save your ass while you're dueling and none of your cooldowns are up. Between exhaust, Q, and E, you have an extensive arsenal for keeping your enemy where you want him, while you lay into him with your massive base AD. While dueling, it also helps you to stay healthy long enough for your W to pop for damage rather than melt away and be worthless.
