How 2 Sion JG with 40% CdR and
Full AD Team (Semi-Full in case the AP doesn't suc
Semi-Full AD (If AP sucks and there's 3 or 4 AD)
Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Answering some doubts (Necessary to read)
Okay, it's my first ever build in Mobafire, so it can be kinda confusing, but I'll explain.
First I shall tell some doubts you may have at this point:
1 - Why not carrying Flash, and why Exhaust?
A: Actually, you don't need to carry Flash on your Summoners Spells. His Ultimate is a perfect escape for pick-offs and chases, since Sion can't take crowd controls while ulted (unless the enemy be a jerk and stands on your way). Exhaust is another slow for Sion's Mechanics (You got Q, E and R, plus the Gauntlet, Mallet,Randuin AND Stalker's Blade ), with all this, it's 100% sure your enemy won't get away so easily
2 - Why 40% Cooldown Reduction build and , instead of Full Health Build?
A: The reason is his late game. With this build and the ult on level 3, you can cast your ultimate each 36 seconds, making him a real express train.
On the MR builds you see the Ionian Boot, which is perfect for him to get 40% even if you don't rush too much Armor. Plus, Sion on Jungle gains a lot of health due to the W passive, so you'll reach the late game spamming skills and tanking a lot of damage
Gameplaying with Sion Jungle (Necessary to read)
You'll start on the Blue Sentinel area, first on the Grump, and prepare your W 4 seconds before the monster spawn (exploding when the frog appears). The Insight Mastery will be the great help here. But don't smite him, save the smite for the Sentinel, after killing the frog, level up your Q and be on a position your Q will hit both Sentries and the Sentinel, and smite it, keep giving basic hits until you get the Q again, use it, give basic hits until you finish it and head over for the Scuttler, save your W and Q, use on it and smite (yeah, smite, fastly), kill it and go for the Murk Wolves.
After cleaning the area, head over for the Brambleback area, killing the Raptors and the other Scuttler (in this case, you don't need to smite this one, since you got the E. Save it for the Brambleback). Do this route until the second Sentinel appears. You'll get level 6 from there and go for the gank with your Ultimate. I suggest you farm on the jungle until you have enough gold for the Complete Jungle Knife Item (and the Boots of Speed). Keep farming until you finish items and gank when you get the ultimate ready.
In Mid to Late Game TFs, Sion's build is perfect. You got the Q, you got the W (which will give many damage to the enemy), you got the E and specially the R, plus the passive of the items and Exhaust to help you winning the fights.
You don't need exactly do AD Items (unless in the build you'll make the Mallet), because Sion already has great damage on the skills, specially the W which will give damage based on the enemy's Max HP.
The combo you make for him is: W (first time) + R + W (to give damage) + Q (after hit with R) + E and goes on.
This build is great for Sion, making him a real undestructable zombie and a perfect champion for give the victory to the team.
Hope you go well with the build. GGWP, guys