Alright some of you may be wondering why I don't open with a dorans blade vs opening with the scptre well the answer to that is simple dorans blade for one only has 3% lifesteal this wont sufice for your e +creep and enemy damage output. At this point you should be choseing who you're better of laneing with you want either a support or a ranger with you so if you're getting focused either you take less damage are healed or they still take damage aka being an off tank. now you've reached level 2 Sion has learned ENRAGE this skill MUST always be on it's the secret to sions early/ mid game control. It will not only increase damage right away but in the long run because of the hp increase ( atmas impaler comes into play) so this is your number one max out skill.

Alright your sion has made it to level 6 congratualtions. You're now your teams biggest asset in a team fight, that is if there are any for some odd reason this early. Now your more then likely still in lanes but you've got a choice to make are you getting heavily pushed or are you pushing them this will change your skill unlocking. If you're getting pushed heavily I strongly sugest you start putting skills into death's caress so you can iniatiate with less worry about your hp if your heavily pushing cryptic gaze could use some love as it will do much more damage.

oh no the team has no more turrets left here comes sion to save the day at this point you better be level 16+ aka having your canabilism at level 3 this way you should be hitting arround 600-700 crits constantly and with 100% life steal this makes you a monster . Sion's ultimate is what makes him such a potent late game champion don't be affraid to run into those 3v1s just make sure you target the squishy damage outputer first if there arn't any focus who ever has the most cc. Now you have to consider that there's a time and a place for everything cause your ult at this stage gives 50% of the damage you do to nearby alies as well so you could potentialy save people.cliiicccckkkkmeeeeee is an example of sions amazing ultimate and it's potential

This section is well pretty obvious however is a matter of personaly prefrence but then aigain there are the what I like to call the nono spells. The following shouldn't be used surge,promote,cleanse,revive clairvoyance, clarity.( garrison if on dominion) and last but not least heal, heal would be over kill your ult is enough common now. Im not saying don't use these i mean if you're the type of person who uses these spells and makes it work im not stopiing you but ingite ghost exhaust teleport all that good stuff seems to be far more usefull..

pros cons
-Great farmer -counterd very well by ingite and exhaust
-No need to buy ad with your E -well that's all your cons...
-Sheild
-Stun
-Natural tank passive
-Super over powerd ult